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ara-mdk / platform / external / skia / d686ac77c2c485c4a3302eda9c1de597a6f8c568 / . / src / gpu / gl / GrGpuGL.cpp
blob: 7ca07a06230f2634daa3bba0c5e894be4597a925 [file] [log] [blame]
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGpuGL.h"
#include "GrGLStencilBuffer.h"
#include "GrGLPath.h"
#include "GrGLShaderBuilder.h"
#include "GrTemplates.h"
#include "GrTypes.h"
#include "SkTemplates.h"
static const GrGLuint GR_MAX_GLUINT = ~0U;
static const GrGLint GR_INVAL_GLINT = ~0;
#define GL_CALL(X) GR_GL_CALL(this->glInterface(), X)
#define GL_CALL_RET(RET, X) GR_GL_CALL_RET(this->glInterface(), RET, X)
// we use a spare texture unit to avoid
// mucking with the state of any of the stages.
static const int SPARE_TEX_UNIT = GrDrawState::kNumStages;
#define SKIP_CACHE_CHECK true
#if GR_GL_CHECK_ALLOC_WITH_GET_ERROR
#define CLEAR_ERROR_BEFORE_ALLOC(iface) GrGLClearErr(iface)
#define GL_ALLOC_CALL(iface, call) GR_GL_CALL_NOERRCHECK(iface, call)
#define CHECK_ALLOC_ERROR(iface) GR_GL_GET_ERROR(iface)
#else
#define CLEAR_ERROR_BEFORE_ALLOC(iface)
#define GL_ALLOC_CALL(iface, call) GR_GL_CALL(iface, call)
#define CHECK_ALLOC_ERROR(iface) GR_GL_NO_ERROR
#endif
///////////////////////////////////////////////////////////////////////////////
static const GrGLenum gXfermodeCoeff2Blend[] = {
GR_GL_ZERO,
GR_GL_ONE,
GR_GL_SRC_COLOR,
GR_GL_ONE_MINUS_SRC_COLOR,
GR_GL_DST_COLOR,
GR_GL_ONE_MINUS_DST_COLOR,
GR_GL_SRC_ALPHA,
GR_GL_ONE_MINUS_SRC_ALPHA,
GR_GL_DST_ALPHA,
GR_GL_ONE_MINUS_DST_ALPHA,
GR_GL_CONSTANT_COLOR,
GR_GL_ONE_MINUS_CONSTANT_COLOR,
GR_GL_CONSTANT_ALPHA,
GR_GL_ONE_MINUS_CONSTANT_ALPHA,
// extended blend coeffs
GR_GL_SRC1_COLOR,
GR_GL_ONE_MINUS_SRC1_COLOR,
GR_GL_SRC1_ALPHA,
GR_GL_ONE_MINUS_SRC1_ALPHA,
};
bool GrGpuGL::BlendCoeffReferencesConstant(GrBlendCoeff coeff) {
static const bool gCoeffReferencesBlendConst[] = {
false,
false,
false,
false,
false,
false,
false,
false,
false,
false,
true,
true,
true,
true,
// extended blend coeffs
false,
false,
false,
false,
};
return gCoeffReferencesBlendConst[coeff];
GR_STATIC_ASSERT(kTotalGrBlendCoeffCount ==
GR_ARRAY_COUNT(gCoeffReferencesBlendConst));
GR_STATIC_ASSERT(0 == kZero_GrBlendCoeff);
GR_STATIC_ASSERT(1 == kOne_GrBlendCoeff);
GR_STATIC_ASSERT(2 == kSC_GrBlendCoeff);
GR_STATIC_ASSERT(3 == kISC_GrBlendCoeff);
GR_STATIC_ASSERT(4 == kDC_GrBlendCoeff);
GR_STATIC_ASSERT(5 == kIDC_GrBlendCoeff);
GR_STATIC_ASSERT(6 == kSA_GrBlendCoeff);
GR_STATIC_ASSERT(7 == kISA_GrBlendCoeff);
GR_STATIC_ASSERT(8 == kDA_GrBlendCoeff);
GR_STATIC_ASSERT(9 == kIDA_GrBlendCoeff);
GR_STATIC_ASSERT(10 == kConstC_GrBlendCoeff);
GR_STATIC_ASSERT(11 == kIConstC_GrBlendCoeff);
GR_STATIC_ASSERT(12 == kConstA_GrBlendCoeff);
GR_STATIC_ASSERT(13 == kIConstA_GrBlendCoeff);
GR_STATIC_ASSERT(14 == kS2C_GrBlendCoeff);
GR_STATIC_ASSERT(15 == kIS2C_GrBlendCoeff);
GR_STATIC_ASSERT(16 == kS2A_GrBlendCoeff);
GR_STATIC_ASSERT(17 == kIS2A_GrBlendCoeff);
// assertion for gXfermodeCoeff2Blend have to be in GrGpu scope
GR_STATIC_ASSERT(kTotalGrBlendCoeffCount ==
GR_ARRAY_COUNT(gXfermodeCoeff2Blend));
}
///////////////////////////////////////////////////////////////////////////////
static bool gPrintStartupSpew;
static bool fbo_test(const GrGLInterface* gl, int w, int h) {
GR_GL_CALL(gl, ActiveTexture(GR_GL_TEXTURE0 + SPARE_TEX_UNIT));
GrGLuint testFBO;
GR_GL_CALL(gl, GenFramebuffers(1, &testFBO));
GR_GL_CALL(gl, BindFramebuffer(GR_GL_FRAMEBUFFER, testFBO));
GrGLuint testRTTex;
GR_GL_CALL(gl, GenTextures(1, &testRTTex));
GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, testRTTex));
// some implementations require texture to be mip-map complete before
// FBO with level 0 bound as color attachment will be framebuffer complete.
GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_MIN_FILTER,
GR_GL_NEAREST));
GR_GL_CALL(gl, TexImage2D(GR_GL_TEXTURE_2D, 0, GR_GL_RGBA, w, h,
0, GR_GL_RGBA, GR_GL_UNSIGNED_BYTE, NULL));
GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, 0));
GR_GL_CALL(gl, FramebufferTexture2D(GR_GL_FRAMEBUFFER,
GR_GL_COLOR_ATTACHMENT0,
GR_GL_TEXTURE_2D, testRTTex, 0));
GrGLenum status;
GR_GL_CALL_RET(gl, status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
GR_GL_CALL(gl, DeleteFramebuffers(1, &testFBO));
GR_GL_CALL(gl, DeleteTextures(1, &testRTTex));
return status == GR_GL_FRAMEBUFFER_COMPLETE;
}
GrGpuGL::GrGpuGL(const GrGLContextInfo& ctxInfo) : fGLContextInfo(ctxInfo) {
GrAssert(ctxInfo.isInitialized());
fillInConfigRenderableTable();
fPrintedCaps = false;
GrGLClearErr(fGLContextInfo.interface());
if (gPrintStartupSpew) {
const GrGLubyte* ext;
GL_CALL_RET(ext, GetString(GR_GL_EXTENSIONS));
const GrGLubyte* vendor;
const GrGLubyte* renderer;
const GrGLubyte* version;
GL_CALL_RET(vendor, GetString(GR_GL_VENDOR));
GL_CALL_RET(renderer, GetString(GR_GL_RENDERER));
GL_CALL_RET(version, GetString(GR_GL_VERSION));
GrPrintf("------------------------- create GrGpuGL %p --------------\n",
this);
GrPrintf("------ VENDOR %s\n", vendor);
GrPrintf("------ RENDERER %s\n", renderer);
GrPrintf("------ VERSION %s\n", version);
GrPrintf("------ EXTENSIONS\n %s \n", ext);
}
this->initCaps();
fProgramCache = SkNEW_ARGS(ProgramCache, (this->glContextInfo()));
fLastSuccessfulStencilFmtIdx = 0;
if (false) { // avoid bit rot, suppress warning
fbo_test(this->glInterface(), 0, 0);
}
}
GrGpuGL::~GrGpuGL() {
if (0 != fHWProgramID) {
// detach the current program so there is no confusion on OpenGL's part
// that we want it to be deleted
GrAssert(fHWProgramID == fCurrentProgram->fProgramID);
GL_CALL(UseProgram(0));
}
delete fProgramCache;
// This must be called by before the GrDrawTarget destructor
this->releaseGeometry();
// This subclass must do this before the base class destructor runs
// since we will unref the GrGLInterface.
this->releaseResources();
}
///////////////////////////////////////////////////////////////////////////////
void GrGpuGL::initCaps() {
GrGLint maxTextureUnits;
// check FS and fixed-function texture unit limits
// we only use textures in the fragment stage currently.
// checks are > to make sure we have a spare unit.
const GrGLInterface* gl = this->glInterface();
GR_GL_GetIntegerv(gl, GR_GL_MAX_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
GrAssert(maxTextureUnits > GrDrawState::kNumStages);
CapsInternals* caps = this->capsInternals();
GrGLint numFormats;
GR_GL_GetIntegerv(gl, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
SkAutoSTMalloc<10, GrGLint> formats(numFormats);
GR_GL_GetIntegerv(gl, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
for (int i = 0; i < numFormats; ++i) {
if (formats[i] == GR_GL_PALETTE8_RGBA8) {
caps->f8BitPaletteSupport = true;
break;
}
}
if (kDesktop_GrGLBinding == this->glBinding()) {
// we could also look for GL_ATI_separate_stencil extension or
// GL_EXT_stencil_two_side but they use different function signatures
// than GL2.0+ (and than each other).
caps->fTwoSidedStencilSupport = (this->glVersion() >= GR_GL_VER(2,0));
// supported on GL 1.4 and higher or by extension
caps->fStencilWrapOpsSupport = (this->glVersion() >= GR_GL_VER(1,4)) ||
this->hasExtension("GL_EXT_stencil_wrap");
} else {
// ES 2 has two sided stencil and stencil wrap
caps->fTwoSidedStencilSupport = true;
caps->fStencilWrapOpsSupport = true;
}
if (kDesktop_GrGLBinding == this->glBinding()) {
caps->fBufferLockSupport = true; // we require VBO support and the desktop VBO
// extension includes glMapBuffer.
} else {
caps->fBufferLockSupport = this->hasExtension("GL_OES_mapbuffer");
}
if (kDesktop_GrGLBinding == this->glBinding()) {
if (this->glVersion() >= GR_GL_VER(2,0) ||
this->hasExtension("GL_ARB_texture_non_power_of_two")) {
caps->fNPOTTextureTileSupport = true;
} else {
caps->fNPOTTextureTileSupport = false;
}
} else {
// Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
caps->fNPOTTextureTileSupport = this->hasExtension("GL_OES_texture_npot");
}
caps->fHWAALineSupport = (kDesktop_GrGLBinding == this->glBinding());
GR_GL_GetIntegerv(gl, GR_GL_MAX_TEXTURE_SIZE, &caps->fMaxTextureSize);
GR_GL_GetIntegerv(gl, GR_GL_MAX_RENDERBUFFER_SIZE, &caps->fMaxRenderTargetSize);
// Our render targets are always created with textures as the color
// attachment, hence this min:
caps->fMaxRenderTargetSize = GrMin(caps->fMaxTextureSize, caps->fMaxRenderTargetSize);
caps->fFSAASupport = GrGLCaps::kNone_MSFBOType != this->glCaps().msFBOType();
caps->fPathStencilingSupport = GR_GL_USE_NV_PATH_RENDERING &&
this->hasExtension("GL_NV_path_rendering");
// Enable supported shader-related caps
if (kDesktop_GrGLBinding == this->glBinding()) {
caps->fDualSourceBlendingSupport =
this->glVersion() >= GR_GL_VER(3,3) ||
this->hasExtension("GL_ARB_blend_func_extended");
caps->fShaderDerivativeSupport = true;
// we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
caps->fGeometryShaderSupport =
this->glVersion() >= GR_GL_VER(3,2) &&
this->glslGeneration() >= k150_GrGLSLGeneration;
} else {
caps->fShaderDerivativeSupport =
this->hasExtension("GL_OES_standard_derivatives");
}
}
void GrGpuGL::fillInConfigRenderableTable() {
// OpenGL < 3.0
// no support for render targets unless the GL_ARB_framebuffer_object
// extension is supported (in which case we get ALPHA, RED, RG, RGB,
// RGBA (ALPHA8, RGBA4, RGBA8) for OpenGL > 1.1). Note that we
// probably don't get R8 in this case.
// OpenGL 3.0
// base color renderable: ALPHA, RED, RG, RGB, and RGBA
// sized derivatives: ALPHA8, R8, RGBA4, RGBA8
// >= OpenGL 3.1
// base color renderable: RED, RG, RGB, and RGBA
// sized derivatives: R8, RGBA4, RGBA8
// if the GL_ARB_compatibility extension is supported then we get back
// support for GL_ALPHA and ALPHA8
// GL_EXT_bgra adds BGRA render targets to any version
// ES 2.0
// color renderable: RGBA4, RGB5_A1, RGB565
// GL_EXT_texture_rg adds support for R8 as a color render target
// GL_OES_rgb8_rgba8 and/or GL_ARM_rgba8 adds support for RGBA8
// GL_EXT_texture_format_BGRA8888 and/or GL_APPLE_texture_format_BGRA8888
// added BGRA support
if (kDesktop_GrGLBinding == this->glBinding()) {
// Post 3.0 we will get R8
// Prior to 3.0 we will get ALPHA8 (with GL_ARB_framebuffer_object)
if (this->glVersion() >= GR_GL_VER(3,0) ||
this->hasExtension("GL_ARB_framebuffer_object")) {
fConfigRenderSupport[kAlpha_8_GrPixelConfig] = true;
}
} else {
// On ES we can only hope for R8
fConfigRenderSupport[kAlpha_8_GrPixelConfig] =
this->glCaps().textureRedSupport();
}
if (kDesktop_GrGLBinding != this->glBinding()) {
// only available in ES
fConfigRenderSupport[kRGB_565_GrPixelConfig] = true;
}
// Pre 3.0, Ganesh relies on either GL_ARB_framebuffer_object or
// GL_EXT_framebuffer_object for FBO support. Both of these
// allow RGBA4 render targets so this is always supported.
fConfigRenderSupport[kRGBA_4444_GrPixelConfig] = true;
if (this->glCaps().rgba8RenderbufferSupport()) {
fConfigRenderSupport[kRGBA_8888_GrPixelConfig] = true;
}
if (this->glCaps().bgraFormatSupport()) {
fConfigRenderSupport[kBGRA_8888_GrPixelConfig] = true;
}
}
GrPixelConfig GrGpuGL::preferredReadPixelsConfig(GrPixelConfig config) const {
if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && GrPixelConfigIsRGBA8888(config)) {
return GrPixelConfigSwapRAndB(config);
} else {
return config;
}
}
GrPixelConfig GrGpuGL::preferredWritePixelsConfig(GrPixelConfig config) const {
if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && GrPixelConfigIsRGBA8888(config)) {
return GrPixelConfigSwapRAndB(config);
} else {
return config;
}
}
bool GrGpuGL::fullReadPixelsIsFasterThanPartial() const {
return SkToBool(GR_GL_FULL_READPIXELS_FASTER_THAN_PARTIAL);
}
void GrGpuGL::onResetContext() {
if (gPrintStartupSpew && !fPrintedCaps) {
fPrintedCaps = true;
this->getCaps().print();
this->glCaps().print();
}
// we don't use the zb at all
GL_CALL(Disable(GR_GL_DEPTH_TEST));
GL_CALL(DepthMask(GR_GL_FALSE));
fHWDrawFace = GrDrawState::kInvalid_DrawFace;
fHWDitherEnabled = kUnknown_TriState;
if (kDesktop_GrGLBinding == this->glBinding()) {
// Desktop-only state that we never change
GL_CALL(Disable(GR_GL_POINT_SMOOTH));
GL_CALL(Disable(GR_GL_LINE_SMOOTH));
GL_CALL(Disable(GR_GL_POLYGON_SMOOTH));
GL_CALL(Disable(GR_GL_POLYGON_STIPPLE));
GL_CALL(Disable(GR_GL_COLOR_LOGIC_OP));
if (this->glCaps().imagingSupport()) {
GL_CALL(Disable(GR_GL_COLOR_TABLE));
}
GL_CALL(Disable(GR_GL_INDEX_LOGIC_OP));
GL_CALL(Disable(GR_GL_POLYGON_OFFSET_FILL));
// Since ES doesn't support glPointSize at all we always use the VS to
// set the point size
GL_CALL(Enable(GR_GL_VERTEX_PROGRAM_POINT_SIZE));
// We should set glPolygonMode(FRONT_AND_BACK,FILL) here, too. It isn't
// currently part of our gl interface. There are probably others as
// well.
}
fHWAAState.invalidate();
fHWWriteToColor = kUnknown_TriState;
// we only ever use lines in hairline mode
GL_CALL(LineWidth(1));
// invalid
fHWActiveTextureUnitIdx = -1;
fHWBlendState.invalidate();
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
fHWBoundTextures[s] = NULL;
}
fHWScissorSettings.invalidate();
fHWViewport.invalidate();
fHWStencilSettings.invalidate();
fHWStencilTestEnabled = kUnknown_TriState;
fHWGeometryState.fIndexBuffer = NULL;
fHWGeometryState.fVertexBuffer = NULL;
fHWGeometryState.fArrayPtrsDirty = true;
fHWBoundRenderTarget = NULL;
fHWPathMatrixState.invalidate();
if (fCaps.pathStencilingSupport()) {
// we don't use the model view matrix.
GL_CALL(MatrixMode(GR_GL_MODELVIEW));
GL_CALL(LoadIdentity());
}
// we assume these values
if (this->glCaps().unpackRowLengthSupport()) {
GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
}
if (this->glCaps().packRowLengthSupport()) {
GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
}
if (this->glCaps().unpackFlipYSupport()) {
GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
}
if (this->glCaps().packFlipYSupport()) {
GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, GR_GL_FALSE));
}
fHWGeometryState.fVertexOffset = ~0U;
// Third party GL code may have left vertex attributes enabled. Some GL
// implementations (osmesa) may read vetex attributes that are not required
// by the current shader. Therefore, we have to ensure that only the
// attributes we require for the current draw are enabled or we may cause an
// invalid read.
// Disable all vertex layout bits so that next flush will assume all
// optional vertex attributes are disabled.
fHWGeometryState.fVertexLayout = 0;
// We always use the this attribute and assume it is always enabled.
int posAttrIdx = GrGLProgram::PositionAttributeIdx();
GL_CALL(EnableVertexAttribArray(posAttrIdx));
// Disable all other vertex attributes.
for (int va = 0; va < this->glCaps().maxVertexAttributes(); ++va) {
if (va != posAttrIdx) {
GL_CALL(DisableVertexAttribArray(va));
}
}
fHWProgramID = 0;
fHWConstAttribColor = GrColor_ILLEGAL;
fHWConstAttribCoverage = GrColor_ILLEGAL;
}
GrTexture* GrGpuGL::onWrapBackendTexture(const GrBackendTextureDesc& desc) {
if (!this->configToGLFormats(desc.fConfig, false, NULL, NULL, NULL)) {
return NULL;
}
if (0 == desc.fTextureHandle) {
return NULL;
}
// FIXME: add support for TopLeft RT's by flipping all draws.
if (desc.fFlags & kRenderTarget_GrBackendTextureFlag &&
kBottomLeft_GrSurfaceOrigin != desc.fOrigin) {
return NULL;
}
int maxSize = this->getCaps().maxTextureSize();
if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
return NULL;
}
GrGLTexture::Desc glTexDesc;
// next line relies on GrBackendTextureDesc's flags matching GrTexture's
glTexDesc.fFlags = (GrTextureFlags) desc.fFlags;
glTexDesc.fWidth = desc.fWidth;
glTexDesc.fHeight = desc.fHeight;
glTexDesc.fConfig = desc.fConfig;
glTexDesc.fSampleCnt = desc.fSampleCnt;
glTexDesc.fTextureID = static_cast<GrGLuint>(desc.fTextureHandle);
glTexDesc.fIsWrapped = true;
glTexDesc.fOrigin = desc.fOrigin;
GrGLTexture* texture = NULL;
if (desc.fFlags & kRenderTarget_GrBackendTextureFlag) {
GrGLRenderTarget::Desc glRTDesc;
glRTDesc.fRTFBOID = 0;
glRTDesc.fTexFBOID = 0;
glRTDesc.fMSColorRenderbufferID = 0;
glRTDesc.fConfig = desc.fConfig;
glRTDesc.fSampleCnt = desc.fSampleCnt;
if (!this->createRenderTargetObjects(glTexDesc.fWidth,
glTexDesc.fHeight,
glTexDesc.fTextureID,
&glRTDesc)) {
return NULL;
}
texture = SkNEW_ARGS(GrGLTexture, (this, glTexDesc, glRTDesc));
} else {
texture = SkNEW_ARGS(GrGLTexture, (this, glTexDesc));
}
if (NULL == texture) {
return NULL;
}
this->setSpareTextureUnit();
return texture;
}
GrRenderTarget* GrGpuGL::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
GrGLRenderTarget::Desc glDesc;
glDesc.fConfig = desc.fConfig;
glDesc.fRTFBOID = static_cast<GrGLuint>(desc.fRenderTargetHandle);
glDesc.fMSColorRenderbufferID = 0;
glDesc.fTexFBOID = GrGLRenderTarget::kUnresolvableFBOID;
glDesc.fSampleCnt = desc.fSampleCnt;
glDesc.fIsWrapped = true;
GrGLIRect viewport;
viewport.fLeft = 0;
viewport.fBottom = 0;
viewport.fWidth = desc.fWidth;
viewport.fHeight = desc.fHeight;
GrRenderTarget* tgt = SkNEW_ARGS(GrGLRenderTarget,
(this, glDesc, viewport));
if (desc.fStencilBits) {
GrGLStencilBuffer::Format format;
format.fInternalFormat = GrGLStencilBuffer::kUnknownInternalFormat;
format.fPacked = false;
format.fStencilBits = desc.fStencilBits;
format.fTotalBits = desc.fStencilBits;
static const bool kIsSBWrapped = false;
GrGLStencilBuffer* sb = SkNEW_ARGS(GrGLStencilBuffer,
(this,
kIsSBWrapped,
0,
desc.fWidth,
desc.fHeight,
desc.fSampleCnt,
format));
tgt->setStencilBuffer(sb);
sb->unref();
}
return tgt;
}
////////////////////////////////////////////////////////////////////////////////
void GrGpuGL::onWriteTexturePixels(GrTexture* texture,
int left, int top, int width, int height,
GrPixelConfig config, const void* buffer,
size_t rowBytes) {
if (NULL == buffer) {
return;
}
GrGLTexture* glTex = static_cast<GrGLTexture*>(texture);
this->setSpareTextureUnit();
GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTex->textureID()));
GrGLTexture::Desc desc;
desc.fFlags = glTex->desc().fFlags;
desc.fWidth = glTex->width();
desc.fHeight = glTex->height();
desc.fConfig = glTex->config();
desc.fSampleCnt = glTex->desc().fSampleCnt;
desc.fTextureID = glTex->textureID();
desc.fOrigin = glTex->origin();
this->uploadTexData(desc, false,
left, top, width, height,
config, buffer, rowBytes);
}
namespace {
bool adjust_pixel_ops_params(int surfaceWidth,
int surfaceHeight,
size_t bpp,
int* left, int* top, int* width, int* height,
const void** data,
size_t* rowBytes) {
if (!*rowBytes) {
*rowBytes = *width * bpp;
}
GrIRect subRect = GrIRect::MakeXYWH(*left, *top, *width, *height);
GrIRect bounds = GrIRect::MakeWH(surfaceWidth, surfaceHeight);
if (!subRect.intersect(bounds)) {
return false;
}
*data = reinterpret_cast<const void*>(reinterpret_cast<intptr_t>(*data) +
(subRect.fTop - *top) * *rowBytes + (subRect.fLeft - *left) * bpp);
*left = subRect.fLeft;
*top = subRect.fTop;
*width = subRect.width();
*height = subRect.height();
return true;
}
}
bool GrGpuGL::uploadTexData(const GrGLTexture::Desc& desc,
bool isNewTexture,
int left, int top, int width, int height,
GrPixelConfig dataConfig,
const void* data,
size_t rowBytes) {
GrAssert(NULL != data || isNewTexture);
size_t bpp = GrBytesPerPixel(dataConfig);
if (!adjust_pixel_ops_params(desc.fWidth, desc.fHeight, bpp, &left, &top,
&width, &height, &data, &rowBytes)) {
return false;
}
size_t trimRowBytes = width * bpp;
// in case we need a temporary, trimmed copy of the src pixels
SkAutoSMalloc<128 * 128> tempStorage;
// paletted textures cannot be partially updated
bool useTexStorage = isNewTexture &&
desc.fConfig != kIndex_8_GrPixelConfig &&
this->glCaps().texStorageSupport();
if (useTexStorage && kDesktop_GrGLBinding == this->glBinding()) {
// 565 is not a sized internal format on desktop GL. So on desktop with
// 565 we always use an unsized internal format to let the system pick
// the best sized format to convert the 565 data to. Since TexStorage
// only allows sized internal formats we will instead use TexImage2D.
useTexStorage = desc.fConfig != kRGB_565_GrPixelConfig;
}
GrGLenum internalFormat;
GrGLenum externalFormat;
GrGLenum externalType;
// glTexStorage requires sized internal formats on both desktop and ES. ES
// glTexImage requires an unsized format.
if (!this->configToGLFormats(dataConfig, useTexStorage, &internalFormat,
&externalFormat, &externalType)) {
return false;
}
if (!isNewTexture && GR_GL_PALETTE8_RGBA8 == internalFormat) {
// paletted textures cannot be updated
return false;
}
/*
* check whether to allocate a temporary buffer for flipping y or
* because our srcData has extra bytes past each row. If so, we need
* to trim those off here, since GL ES may not let us specify
* GL_UNPACK_ROW_LENGTH.
*/
bool restoreGLRowLength = false;
bool swFlipY = false;
bool glFlipY = false;
if (NULL != data) {
if (kBottomLeft_GrSurfaceOrigin == desc.fOrigin) {
if (this->glCaps().unpackFlipYSupport()) {
glFlipY = true;
} else {
swFlipY = true;
}
}
if (this->glCaps().unpackRowLengthSupport() && !swFlipY) {
// can't use this for flipping, only non-neg values allowed. :(
if (rowBytes != trimRowBytes) {
GrGLint rowLength = static_cast<GrGLint>(rowBytes / bpp);
GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, rowLength));
restoreGLRowLength = true;
}
} else {
if (trimRowBytes != rowBytes || swFlipY) {
// copy data into our new storage, skipping the trailing bytes
size_t trimSize = height * trimRowBytes;
const char* src = (const char*)data;
if (swFlipY) {
src += (height - 1) * rowBytes;
}
char* dst = (char*)tempStorage.reset(trimSize);
for (int y = 0; y < height; y++) {
memcpy(dst, src, trimRowBytes);
if (swFlipY) {
src -= rowBytes;
} else {
src += rowBytes;
}
dst += trimRowBytes;
}
// now point data to our copied version
data = tempStorage.get();
}
}
if (glFlipY) {
GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_TRUE));
}
GL_CALL(PixelStorei(GR_GL_UNPACK_ALIGNMENT, static_cast<GrGLint>(bpp)));
}
bool succeeded = true;
if (isNewTexture &&
0 == left && 0 == top &&
desc.fWidth == width && desc.fHeight == height) {
CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
if (useTexStorage) {
// We never resize or change formats of textures. We don't use
// mipmaps currently.
GL_ALLOC_CALL(this->glInterface(),
TexStorage2D(GR_GL_TEXTURE_2D,
1, // levels
internalFormat,
desc.fWidth, desc.fHeight));
} else {
if (GR_GL_PALETTE8_RGBA8 == internalFormat) {
GrGLsizei imageSize = desc.fWidth * desc.fHeight +
kGrColorTableSize;
GL_ALLOC_CALL(this->glInterface(),
CompressedTexImage2D(GR_GL_TEXTURE_2D,
0, // level
internalFormat,
desc.fWidth, desc.fHeight,
0, // border
imageSize,
data));
} else {
GL_ALLOC_CALL(this->glInterface(),
TexImage2D(GR_GL_TEXTURE_2D,
0, // level
internalFormat,
desc.fWidth, desc.fHeight,
0, // border
externalFormat, externalType,
data));
}
}
GrGLenum error = CHECK_ALLOC_ERROR(this->glInterface());
if (error != GR_GL_NO_ERROR) {
succeeded = false;
} else {
// if we have data and we used TexStorage to create the texture, we
// now upload with TexSubImage.
if (NULL != data && useTexStorage) {
GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
0, // level
left, top,
width, height,
externalFormat, externalType,
data));
}
}
} else {
if (swFlipY || glFlipY) {
top = desc.fHeight - (top + height);
}
GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
0, // level
left, top,
width, height,
externalFormat, externalType, data));
}
if (restoreGLRowLength) {
GrAssert(this->glCaps().unpackRowLengthSupport());
GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
}
if (glFlipY) {
GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
}
return succeeded;
}
namespace {
bool renderbuffer_storage_msaa(GrGLContextInfo& ctxInfo,
int sampleCount,
GrGLenum format,
int width, int height) {
CLEAR_ERROR_BEFORE_ALLOC(ctxInfo.interface());
GrAssert(GrGLCaps::kNone_MSFBOType != ctxInfo.caps().msFBOType());
bool created = false;
if (GrGLCaps::kNVDesktop_CoverageAAType ==
ctxInfo.caps().coverageAAType()) {
const GrGLCaps::MSAACoverageMode& mode =
ctxInfo.caps().getMSAACoverageMode(sampleCount);
GL_ALLOC_CALL(ctxInfo.interface(),
RenderbufferStorageMultisampleCoverage(GR_GL_RENDERBUFFER,
mode.fCoverageSampleCnt,
mode.fColorSampleCnt,
format,
width, height));
created = (GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(ctxInfo.interface()));
}
if (!created) {
// glRBMS will fail if requested samples is > max samples.
sampleCount = GrMin(sampleCount, ctxInfo.caps().maxSampleCount());
GL_ALLOC_CALL(ctxInfo.interface(),
RenderbufferStorageMultisample(GR_GL_RENDERBUFFER,
sampleCount,
format,
width, height));
created = (GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(ctxInfo.interface()));
}
return created;
}
}
bool GrGpuGL::createRenderTargetObjects(int width, int height,
GrGLuint texID,
GrGLRenderTarget::Desc* desc) {
desc->fMSColorRenderbufferID = 0;
desc->fRTFBOID = 0;
desc->fTexFBOID = 0;
desc->fIsWrapped = false;
GrGLenum status;
GrGLenum msColorFormat = 0; // suppress warning
GL_CALL(GenFramebuffers(1, &desc->fTexFBOID));
if (!desc->fTexFBOID) {
goto FAILED;
}
// If we are using multisampling we will create two FBOS. We render
// to one and then resolve to the texture bound to the other.
if (desc->fSampleCnt > 0) {
if (GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType()) {
goto FAILED;
}
GL_CALL(GenFramebuffers(1, &desc->fRTFBOID));
GL_CALL(GenRenderbuffers(1, &desc->fMSColorRenderbufferID));
if (!desc->fRTFBOID ||
!desc->fMSColorRenderbufferID ||
!this->configToGLFormats(desc->fConfig,
// GLES requires sized internal formats
kES2_GrGLBinding == this->glBinding(),
&msColorFormat, NULL, NULL)) {
goto FAILED;
}
} else {
desc->fRTFBOID = desc->fTexFBOID;
}
// below here we may bind the FBO
fHWBoundRenderTarget = NULL;
if (desc->fRTFBOID != desc->fTexFBOID) {
GrAssert(desc->fSampleCnt > 0);
GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER,
desc->fMSColorRenderbufferID));
if (!renderbuffer_storage_msaa(fGLContextInfo,
desc->fSampleCnt,
msColorFormat,
width, height)) {
goto FAILED;
}
GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, desc->fRTFBOID));
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_COLOR_ATTACHMENT0,
GR_GL_RENDERBUFFER,
desc->fMSColorRenderbufferID));
if (!this->glCaps().isConfigVerifiedColorAttachment(desc->fConfig)) {
GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
goto FAILED;
}
fGLContextInfo.caps().markConfigAsValidColorAttachment(
desc->fConfig);
}
}
GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, desc->fTexFBOID));
GL_CALL(FramebufferTexture2D(GR_GL_FRAMEBUFFER,
GR_GL_COLOR_ATTACHMENT0,
GR_GL_TEXTURE_2D,
texID, 0));
if (!this->glCaps().isConfigVerifiedColorAttachment(desc->fConfig)) {
GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
goto FAILED;
}
fGLContextInfo.caps().markConfigAsValidColorAttachment(desc->fConfig);
}
return true;
FAILED:
if (desc->fMSColorRenderbufferID) {
GL_CALL(DeleteRenderbuffers(1, &desc->fMSColorRenderbufferID));
}
if (desc->fRTFBOID != desc->fTexFBOID) {
GL_CALL(DeleteFramebuffers(1, &desc->fRTFBOID));
}
if (desc->fTexFBOID) {
GL_CALL(DeleteFramebuffers(1, &desc->fTexFBOID));
}
return false;
}
// good to set a break-point here to know when createTexture fails
static GrTexture* return_null_texture() {
// GrAssert(!"null texture");
return NULL;
}
#if 0 && GR_DEBUG
static size_t as_size_t(int x) {
return x;
}
#endif
GrTexture* GrGpuGL::onCreateTexture(const GrTextureDesc& desc,
const void* srcData,
size_t rowBytes) {
GrGLTexture::Desc glTexDesc;
GrGLRenderTarget::Desc glRTDesc;
// Attempt to catch un- or wrongly initialized sample counts;
GrAssert(desc.fSampleCnt >= 0 && desc.fSampleCnt <= 64);
glTexDesc.fFlags = desc.fFlags;
glTexDesc.fWidth = desc.fWidth;
glTexDesc.fHeight = desc.fHeight;
glTexDesc.fConfig = desc.fConfig;
glTexDesc.fSampleCnt = desc.fSampleCnt;
glTexDesc.fIsWrapped = false;
glRTDesc.fMSColorRenderbufferID = 0;
glRTDesc.fRTFBOID = 0;
glRTDesc.fTexFBOID = 0;
glRTDesc.fIsWrapped = false;
glRTDesc.fConfig = glTexDesc.fConfig;
bool renderTarget = 0 != (desc.fFlags & kRenderTarget_GrTextureFlagBit);
const Caps& caps = this->getCaps();
// We keep GrRenderTargets in GL's normal orientation so that they
// can be drawn to by the outside world without the client having
// to render upside down.
glTexDesc.fOrigin = renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
glRTDesc.fSampleCnt = desc.fSampleCnt;
if (GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType() &&
desc.fSampleCnt) {
//GrPrintf("MSAA RT requested but not supported on this platform.");
return return_null_texture();
}
if (renderTarget) {
if (glTexDesc.fWidth > caps.maxRenderTargetSize() ||
glTexDesc.fHeight > caps.maxRenderTargetSize()) {
return return_null_texture();
}
}
GL_CALL(GenTextures(1, &glTexDesc.fTextureID));
if (renderTarget && this->glCaps().textureUsageSupport()) {
// provides a hint about how this texture will be used
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_USAGE,
GR_GL_FRAMEBUFFER_ATTACHMENT));
}
if (!glTexDesc.fTextureID) {
return return_null_texture();
}
this->setSpareTextureUnit();
GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTexDesc.fTextureID));
// Some drivers like to know filter/wrap before seeing glTexImage2D. Some
// drivers have a bug where an FBO won't be complete if it includes a
// texture that is not mipmap complete (considering the filter in use).
GrGLTexture::TexParams initialTexParams;
// we only set a subset here so invalidate first
initialTexParams.invalidate();
initialTexParams.fFilter = GR_GL_NEAREST;
initialTexParams.fWrapS = GR_GL_CLAMP_TO_EDGE;
initialTexParams.fWrapT = GR_GL_CLAMP_TO_EDGE;
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_MAG_FILTER,
initialTexParams.fFilter));
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_MIN_FILTER,
initialTexParams.fFilter));
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_WRAP_S,
initialTexParams.fWrapS));
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_WRAP_T,
initialTexParams.fWrapT));
if (!this->uploadTexData(glTexDesc, true, 0, 0,
glTexDesc.fWidth, glTexDesc.fHeight,
desc.fConfig, srcData, rowBytes)) {
GL_CALL(DeleteTextures(1, &glTexDesc.fTextureID));
return return_null_texture();
}
GrGLTexture* tex;
if (renderTarget) {
// unbind the texture from the texture unit before binding it to the frame buffer
GL_CALL(BindTexture(GR_GL_TEXTURE_2D, 0));
if (!this->createRenderTargetObjects(glTexDesc.fWidth,
glTexDesc.fHeight,
glTexDesc.fTextureID,
&glRTDesc)) {
GL_CALL(DeleteTextures(1, &glTexDesc.fTextureID));
return return_null_texture();
}
tex = SkNEW_ARGS(GrGLTexture, (this, glTexDesc, glRTDesc));
} else {
tex = SkNEW_ARGS(GrGLTexture, (this, glTexDesc));
}
tex->setCachedTexParams(initialTexParams, this->getResetTimestamp());
#ifdef TRACE_TEXTURE_CREATION
GrPrintf("--- new texture [%d] size=(%d %d) config=%d\n",
glTexDesc.fTextureID, desc.fWidth, desc.fHeight, desc.fConfig);
#endif
return tex;
}
namespace {
const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
void inline get_stencil_rb_sizes(const GrGLInterface* gl,
GrGLuint rb,
GrGLStencilBuffer::Format* format) {
// we shouldn't ever know one size and not the other
GrAssert((kUnknownBitCount == format->fStencilBits) ==
(kUnknownBitCount == format->fTotalBits));
if (kUnknownBitCount == format->fStencilBits) {
GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
GR_GL_RENDERBUFFER_STENCIL_SIZE,
(GrGLint*)&format->fStencilBits);
if (format->fPacked) {
GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
GR_GL_RENDERBUFFER_DEPTH_SIZE,
(GrGLint*)&format->fTotalBits);
format->fTotalBits += format->fStencilBits;
} else {
format->fTotalBits = format->fStencilBits;
}
}
}
}
bool GrGpuGL::createStencilBufferForRenderTarget(GrRenderTarget* rt,
int width, int height) {
// All internally created RTs are also textures. We don't create
// SBs for a client's standalone RT (that is a RT that isn't also a texture).
GrAssert(rt->asTexture());
GrAssert(width >= rt->width());
GrAssert(height >= rt->height());
int samples = rt->numSamples();
GrGLuint sbID;
GL_CALL(GenRenderbuffers(1, &sbID));
if (!sbID) {
return false;
}
int stencilFmtCnt = this->glCaps().stencilFormats().count();
for (int i = 0; i < stencilFmtCnt; ++i) {
GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER, sbID));
// we start with the last stencil format that succeeded in hopes
// that we won't go through this loop more than once after the
// first (painful) stencil creation.
int sIdx = (i + fLastSuccessfulStencilFmtIdx) % stencilFmtCnt;
const GrGLCaps::StencilFormat& sFmt =
this->glCaps().stencilFormats()[sIdx];
CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
// we do this "if" so that we don't call the multisample
// version on a GL that doesn't have an MSAA extension.
bool created;
if (samples > 0) {
created = renderbuffer_storage_msaa(fGLContextInfo,
samples,
sFmt.fInternalFormat,
width, height);
} else {
GL_ALLOC_CALL(this->glInterface(),
RenderbufferStorage(GR_GL_RENDERBUFFER,
sFmt.fInternalFormat,
width, height));
created =
(GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(this->glInterface()));
}
if (created) {
// After sized formats we attempt an unsized format and take
// whatever sizes GL gives us. In that case we query for the size.
GrGLStencilBuffer::Format format = sFmt;
get_stencil_rb_sizes(this->glInterface(), sbID, &format);
static const bool kIsWrapped = false;
SkAutoTUnref<GrStencilBuffer> sb(SkNEW_ARGS(GrGLStencilBuffer,
(this, kIsWrapped, sbID, width, height,
samples, format)));
if (this->attachStencilBufferToRenderTarget(sb, rt)) {
fLastSuccessfulStencilFmtIdx = sIdx;
sb->transferToCache();
rt->setStencilBuffer(sb);
return true;
}
sb->abandon(); // otherwise we lose sbID
}
}
GL_CALL(DeleteRenderbuffers(1, &sbID));
return false;
}
bool GrGpuGL::attachStencilBufferToRenderTarget(GrStencilBuffer* sb,
GrRenderTarget* rt) {
GrGLRenderTarget* glrt = (GrGLRenderTarget*) rt;
GrGLuint fbo = glrt->renderFBOID();
if (NULL == sb) {
if (NULL != rt->getStencilBuffer()) {
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_STENCIL_ATTACHMENT,
GR_GL_RENDERBUFFER, 0));
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_DEPTH_ATTACHMENT,
GR_GL_RENDERBUFFER, 0));
#if GR_DEBUG
GrGLenum status;
GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
GrAssert(GR_GL_FRAMEBUFFER_COMPLETE == status);
#endif
}
return true;
} else {
GrGLStencilBuffer* glsb = (GrGLStencilBuffer*) sb;
GrGLuint rb = glsb->renderbufferID();
fHWBoundRenderTarget = NULL;
GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, fbo));
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_STENCIL_ATTACHMENT,
GR_GL_RENDERBUFFER, rb));
if (glsb->format().fPacked) {
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_DEPTH_ATTACHMENT,
GR_GL_RENDERBUFFER, rb));
} else {
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_DEPTH_ATTACHMENT,
GR_GL_RENDERBUFFER, 0));
}
GrGLenum status;
if (!this->glCaps().isColorConfigAndStencilFormatVerified(rt->config(),
glsb->format())) {
GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_STENCIL_ATTACHMENT,
GR_GL_RENDERBUFFER, 0));
if (glsb->format().fPacked) {
GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
GR_GL_DEPTH_ATTACHMENT,
GR_GL_RENDERBUFFER, 0));
}
return false;
} else {
fGLContextInfo.caps().markColorConfigAndStencilFormatAsVerified(
rt->config(),
glsb->format());
}
}
return true;
}
}
////////////////////////////////////////////////////////////////////////////////
GrVertexBuffer* GrGpuGL::onCreateVertexBuffer(uint32_t size, bool dynamic) {
GrGLuint id;
GL_CALL(GenBuffers(1, &id));
if (id) {
GL_CALL(BindBuffer(GR_GL_ARRAY_BUFFER, id));
fHWGeometryState.fArrayPtrsDirty = true;
CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
// make sure driver can allocate memory for this buffer
GL_ALLOC_CALL(this->glInterface(),
BufferData(GR_GL_ARRAY_BUFFER,
size,
NULL, // data ptr
dynamic ? GR_GL_DYNAMIC_DRAW :
GR_GL_STATIC_DRAW));
if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
GL_CALL(DeleteBuffers(1, &id));
// deleting bound buffer does implicit bind to 0
fHWGeometryState.fVertexBuffer = NULL;
return NULL;
}
static const bool kIsWrapped = false;
GrGLVertexBuffer* vertexBuffer = SkNEW_ARGS(GrGLVertexBuffer,
(this, kIsWrapped, id,
size, dynamic));
fHWGeometryState.fVertexBuffer = vertexBuffer;
return vertexBuffer;
}
return NULL;
}
GrIndexBuffer* GrGpuGL::onCreateIndexBuffer(uint32_t size, bool dynamic) {
GrGLuint id;
GL_CALL(GenBuffers(1, &id));
if (id) {
GL_CALL(BindBuffer(GR_GL_ELEMENT_ARRAY_BUFFER, id));
CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
// make sure driver can allocate memory for this buffer
GL_ALLOC_CALL(this->glInterface(),
BufferData(GR_GL_ELEMENT_ARRAY_BUFFER,
size,
NULL, // data ptr
dynamic ? GR_GL_DYNAMIC_DRAW :
GR_GL_STATIC_DRAW));
if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
GL_CALL(DeleteBuffers(1, &id));
// deleting bound buffer does implicit bind to 0
fHWGeometryState.fIndexBuffer = NULL;
return NULL;
}
static const bool kIsWrapped = false;
GrIndexBuffer* indexBuffer = SkNEW_ARGS(GrGLIndexBuffer,
(this, kIsWrapped, id, size, dynamic));
fHWGeometryState.fIndexBuffer = indexBuffer;
return indexBuffer;
}
return NULL;
}
GrPath* GrGpuGL::onCreatePath(const SkPath& inPath) {
GrAssert(fCaps.pathStencilingSupport());
return SkNEW_ARGS(GrGLPath, (this, inPath));
}
void GrGpuGL::flushScissor() {
const GrDrawState& drawState = this->getDrawState();
const GrGLRenderTarget* rt =
static_cast<const GrGLRenderTarget*>(drawState.getRenderTarget());
GrAssert(NULL != rt);
const GrGLIRect& vp = rt->getViewport();
if (fScissorState.fEnabled) {
GrGLIRect scissor;
scissor.setRelativeTo(vp,
fScissorState.fRect.fLeft,
fScissorState.fRect.fTop,
fScissorState.fRect.width(),
fScissorState.fRect.height());
// if the scissor fully contains the viewport then we fall through and
// disable the scissor test.
if (!scissor.contains(vp)) {
if (fHWScissorSettings.fRect != scissor) {
scissor.pushToGLScissor(this->glInterface());
fHWScissorSettings.fRect = scissor;
}
if (kYes_TriState != fHWScissorSettings.fEnabled) {
GL_CALL(Enable(GR_GL_SCISSOR_TEST));
fHWScissorSettings.fEnabled = kYes_TriState;
}
return;
}
}
if (kNo_TriState != fHWScissorSettings.fEnabled) {
GL_CALL(Disable(GR_GL_SCISSOR_TEST));
fHWScissorSettings.fEnabled = kNo_TriState;
return;
}
}
void GrGpuGL::onClear(const GrIRect* rect, GrColor color) {
const GrDrawState& drawState = this->getDrawState();
const GrRenderTarget* rt = drawState.getRenderTarget();
// parent class should never let us get here with no RT
GrAssert(NULL != rt);
GrIRect clippedRect;
if (NULL != rect) {
// flushScissor expects rect to be clipped to the target.
clippedRect = *rect;
GrIRect rtRect = SkIRect::MakeWH(rt->width(), rt->height());
if (clippedRect.intersect(rtRect)) {
rect = &clippedRect;
} else {
return;
}
}
this->flushRenderTarget(rect);
GrAutoTRestore<ScissorState> asr(&fScissorState);
fScissorState.fEnabled = (NULL != rect);
if (fScissorState.fEnabled) {
fScissorState.fRect = *rect;
}
this->flushScissor();
GrGLfloat r, g, b, a;
static const GrGLfloat scale255 = 1.f / 255.f;
a = GrColorUnpackA(color) * scale255;
GrGLfloat scaleRGB = scale255;
r = GrColorUnpackR(color) * scaleRGB;
g = GrColorUnpackG(color) * scaleRGB;
b = GrColorUnpackB(color) * scaleRGB;
GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
fHWWriteToColor = kYes_TriState;
GL_CALL(ClearColor(r, g, b, a));
GL_CALL(Clear(GR_GL_COLOR_BUFFER_BIT));
}
void GrGpuGL::clearStencil() {
if (NULL == this->getDrawState().getRenderTarget()) {
return;
}
this->flushRenderTarget(&GrIRect::EmptyIRect());
GrAutoTRestore<ScissorState> asr(&fScissorState);
fScissorState.fEnabled = false;
this->flushScissor();
GL_CALL(StencilMask(0xffffffff));
GL_CALL(ClearStencil(0));
GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
fHWStencilSettings.invalidate();
}
void GrGpuGL::clearStencilClip(const GrIRect& rect, bool insideClip) {
const GrDrawState& drawState = this->getDrawState();
const GrRenderTarget* rt = drawState.getRenderTarget();
GrAssert(NULL != rt);
// this should only be called internally when we know we have a
// stencil buffer.
GrAssert(NULL != rt->getStencilBuffer());
GrGLint stencilBitCount = rt->getStencilBuffer()->bits();
#if 0
GrAssert(stencilBitCount > 0);
GrGLint clipStencilMask = (1 << (stencilBitCount - 1));
#else
// we could just clear the clip bit but when we go through
// ANGLE a partial stencil mask will cause clears to be
// turned into draws. Our contract on GrDrawTarget says that
// changing the clip between stencil passes may or may not
// zero the client's clip bits. So we just clear the whole thing.
static const GrGLint clipStencilMask = ~0;
#endif
GrGLint value;
if (insideClip) {
value = (1 << (stencilBitCount - 1));
} else {
value = 0;
}
this->flushRenderTarget(&GrIRect::EmptyIRect());
GrAutoTRestore<ScissorState> asr(&fScissorState);
fScissorState.fEnabled = true;
fScissorState.fRect = rect;
this->flushScissor();
GL_CALL(StencilMask((uint32_t) clipStencilMask));
GL_CALL(ClearStencil(value));
GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
fHWStencilSettings.invalidate();
}
void GrGpuGL::onForceRenderTargetFlush() {
this->flushRenderTarget(&GrIRect::EmptyIRect());
}
bool GrGpuGL::readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
int left, int top,
int width, int height,
GrPixelConfig config,
size_t rowBytes) const {
// if GL can do the flip then we'll never pay for it.
if (this->glCaps().packFlipYSupport()) {
return false;
}
// If we have to do memcpy to handle non-trim rowBytes then we
// get the flip for free. Otherwise it costs.
if (this->glCaps().packRowLengthSupport()) {
return true;
}
// If we have to do memcpys to handle rowBytes then y-flip is free
// Note the rowBytes might be tight to the passed in data, but if data
// gets clipped in x to the target the rowBytes will no longer be tight.
if (left >= 0 && (left + width) < renderTarget->width()) {
return 0 == rowBytes ||
GrBytesPerPixel(config) * width == rowBytes;
} else {
return false;
}
}
bool GrGpuGL::onReadPixels(GrRenderTarget* target,
int left, int top,
int width, int height,
GrPixelConfig config,
void* buffer,
size_t rowBytes,
bool invertY) {
GrGLenum format;
GrGLenum type;
if (!this->configToGLFormats(config, false, NULL, &format, &type)) {
return false;
}
size_t bpp = GrBytesPerPixel(config);
if (!adjust_pixel_ops_params(target->width(), target->height(), bpp,
&left, &top, &width, &height,
const_cast<const void**>(&buffer),
&rowBytes)) {
return false;
}
// resolve the render target if necessary
GrGLRenderTarget* tgt = static_cast<GrGLRenderTarget*>(target);
GrDrawState::AutoRenderTargetRestore artr;
switch (tgt->getResolveType()) {
case GrGLRenderTarget::kCantResolve_ResolveType:
return false;
case GrGLRenderTarget::kAutoResolves_ResolveType:
artr.set(this->drawState(), target);
this->flushRenderTarget(&GrIRect::EmptyIRect());
break;
case GrGLRenderTarget::kCanResolve_ResolveType:
this->onResolveRenderTarget(tgt);
// we don't track the state of the READ FBO ID.
GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER,
tgt->textureFBOID()));
break;
default:
GrCrash("Unknown resolve type");
}
const GrGLIRect& glvp = tgt->getViewport();
// the read rect is viewport-relative
GrGLIRect readRect;
readRect.setRelativeTo(glvp, left, top, width, height);
size_t tightRowBytes = bpp * width;
if (0 == rowBytes) {
rowBytes = tightRowBytes;
}
size_t readDstRowBytes = tightRowBytes;
void* readDst = buffer;
// determine if GL can read using the passed rowBytes or if we need
// a scratch buffer.
SkAutoSMalloc<32 * sizeof(GrColor)> scratch;
if (rowBytes != tightRowBytes) {
if (this->glCaps().packRowLengthSupport()) {
GrAssert(!(rowBytes % sizeof(GrColor)));
GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, rowBytes / sizeof(GrColor)));
readDstRowBytes = rowBytes;
} else {
scratch.reset(tightRowBytes * height);
readDst = scratch.get();
}
}
if (!invertY && this->glCaps().packFlipYSupport()) {
GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 1));
}
GL_CALL(ReadPixels(readRect.fLeft, readRect.fBottom,
readRect.fWidth, readRect.fHeight,
format, type, readDst));
if (readDstRowBytes != tightRowBytes) {
GrAssert(this->glCaps().packRowLengthSupport());
GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
}
if (!invertY && this->glCaps().packFlipYSupport()) {
GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 0));
invertY = true;
}
// now reverse the order of the rows, since GL's are bottom-to-top, but our
// API presents top-to-bottom. We must preserve the padding contents. Note
// that the above readPixels did not overwrite the padding.
if (readDst == buffer) {
GrAssert(rowBytes == readDstRowBytes);
if (!invertY) {
scratch.reset(tightRowBytes);
void* tmpRow = scratch.get();
// flip y in-place by rows
const int halfY = height >> 1;
char* top = reinterpret_cast<char*>(buffer);
char* bottom = top + (height - 1) * rowBytes;
for (int y = 0; y < halfY; y++) {
memcpy(tmpRow, top, tightRowBytes);
memcpy(top, bottom, tightRowBytes);
memcpy(bottom, tmpRow, tightRowBytes);
top += rowBytes;
bottom -= rowBytes;
}
}
} else {
GrAssert(readDst != buffer); GrAssert(rowBytes != tightRowBytes);
// copy from readDst to buffer while flipping y
// const int halfY = height >> 1;
const char* src = reinterpret_cast<const char*>(readDst);
char* dst = reinterpret_cast<char*>(buffer);
if (!invertY) {
dst += (height-1) * rowBytes;
}
for (int y = 0; y < height; y++) {
memcpy(dst, src, tightRowBytes);
src += readDstRowBytes;
if (invertY) {
dst += rowBytes;
} else {
dst -= rowBytes;
}
}
}
return true;
}
void GrGpuGL::flushRenderTarget(const GrIRect* bound) {
GrGLRenderTarget* rt =
static_cast<GrGLRenderTarget*>(this->drawState()->getRenderTarget());
GrAssert(NULL != rt);
if (fHWBoundRenderTarget != rt) {
GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, rt->renderFBOID()));
#if GR_DEBUG
GrGLenum status;
GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
GrPrintf("GrGpuGL::flushRenderTarget glCheckFramebufferStatus %x\n", status);
}
#endif
fHWBoundRenderTarget = rt;
const GrGLIRect& vp = rt->getViewport();
if (fHWViewport != vp) {
vp.pushToGLViewport(this->glInterface());
fHWViewport = vp;
}
}
if (NULL == bound || !bound->isEmpty()) {
rt->flagAsNeedingResolve(bound);
}
}
GrGLenum gPrimitiveType2GLMode[] = {
GR_GL_TRIANGLES,
GR_GL_TRIANGLE_STRIP,
GR_GL_TRIANGLE_FAN,
GR_GL_POINTS,
GR_GL_LINES,
GR_GL_LINE_STRIP
};
#define SWAP_PER_DRAW 0
#if SWAP_PER_DRAW
#if GR_MAC_BUILD
#include <AGL/agl.h>
#elif GR_WIN32_BUILD
#include <gl/GL.h>
void SwapBuf() {
DWORD procID = GetCurrentProcessId();
HWND hwnd = GetTopWindow(GetDesktopWindow());
while(hwnd) {
DWORD wndProcID = 0;
GetWindowThreadProcessId(hwnd, &wndProcID);
if(wndProcID == procID) {
SwapBuffers(GetDC(hwnd));
}
hwnd = GetNextWindow(hwnd, GW_HWNDNEXT);
}
}
#endif
#endif
void GrGpuGL::onGpuDraw(const DrawInfo& info) {
int extraStartIndexOffset;
this->setupGeometry(info, &extraStartIndexOffset);
GrAssert((size_t)info.primitiveType() < GR_ARRAY_COUNT(gPrimitiveType2GLMode));
GrAssert(NULL != fHWGeometryState.fVertexBuffer);
if (info.isIndexed()) {
GrAssert(NULL != fHWGeometryState.fIndexBuffer);
GrGLvoid* indices = (GrGLvoid*)(sizeof(uint16_t) * (info.startIndex() +
extraStartIndexOffset));
// info.startVertex() was accounted for by setupGeometry.
GL_CALL(DrawElements(gPrimitiveType2GLMode[info.primitiveType()],
info.indexCount(),
GR_GL_UNSIGNED_SHORT,
indices));
} else {
// Pass 0 for parameter first. We have to adjust glVertexAttribPointer() to account for
// startVertex in the DrawElements case. So we always rely on setupGeometry to have
// accounted for startVertex.
GL_CALL(DrawArrays(gPrimitiveType2GLMode[info.primitiveType()], 0, info.vertexCount()));
}
#if SWAP_PER_DRAW
glFlush();
#if GR_MAC_BUILD
aglSwapBuffers(aglGetCurrentContext());
int set_a_break_pt_here = 9;
aglSwapBuffers(aglGetCurrentContext());
#elif GR_WIN32_BUILD
SwapBuf();
int set_a_break_pt_here = 9;
SwapBuf();
#endif
#endif
}
namespace {
static const uint16_t kOnes16 = static_cast<uint16_t>(~0);
const GrStencilSettings& winding_nv_path_stencil_settings() {
GR_STATIC_CONST_SAME_STENCIL_STRUCT(gSettings,
kIncClamp_StencilOp,
kIncClamp_StencilOp,
kAlwaysIfInClip_StencilFunc,
kOnes16, kOnes16, kOnes16);
return *GR_CONST_STENCIL_SETTINGS_PTR_FROM_STRUCT_PTR(&gSettings);
}
const GrStencilSettings& even_odd_nv_path_stencil_settings() {
GR_STATIC_CONST_SAME_STENCIL_STRUCT(gSettings,
kInvert_StencilOp,
kInvert_StencilOp,
kAlwaysIfInClip_StencilFunc,
kOnes16, kOnes16, kOnes16);
return *GR_CONST_STENCIL_SETTINGS_PTR_FROM_STRUCT_PTR(&gSettings);
}
}
void GrGpuGL::setStencilPathSettings(const GrPath&,
SkPath::FillType fill,
GrStencilSettings* settings) {
switch (fill) {
case SkPath::kEvenOdd_FillType:
*settings = even_odd_nv_path_stencil_settings();
return;
case SkPath::kWinding_FillType:
*settings = winding_nv_path_stencil_settings();
return;
default:
GrCrash("Unexpected path fill.");
}
}
void GrGpuGL::onGpuStencilPath(const GrPath* path, SkPath::FillType fill) {
GrAssert(fCaps.pathStencilingSupport());
GrGLuint id = static_cast<const GrGLPath*>(path)->pathID();
GrDrawState* drawState = this->drawState();
GrAssert(NULL != drawState->getRenderTarget());
if (NULL == drawState->getRenderTarget()->getStencilBuffer()) {
return;
}
// Decide how to manipulate the stencil buffer based on the fill rule.
// Also, assert that the stencil settings we set in setStencilPathSettings
// are present.
GrAssert(!fStencilSettings.isTwoSided());
GrGLenum fillMode;
switch (fill) {
case SkPath::kWinding_FillType:
fillMode = GR_GL_COUNT_UP;
GrAssert(kIncClamp_StencilOp ==
fStencilSettings.passOp(GrStencilSettings::kFront_Face));
GrAssert(kIncClamp_StencilOp ==
fStencilSettings.failOp(GrStencilSettings::kFront_Face));
break;
case SkPath::kEvenOdd_FillType:
fillMode = GR_GL_INVERT;
GrAssert(kInvert_StencilOp ==
fStencilSettings.passOp(GrStencilSettings::kFront_Face));
GrAssert(kInvert_StencilOp ==
fStencilSettings.failOp(GrStencilSettings::kFront_Face));
break;
default:
// Only the above two fill rules are allowed.
GrCrash("Unexpected path fill.");
return; // suppress unused var warning.
}
GrGLint writeMask = fStencilSettings.writeMask(GrStencilSettings::kFront_Face);
GL_CALL(StencilFillPath(id, fillMode, writeMask));
}
void GrGpuGL::onResolveRenderTarget(GrRenderTarget* target) {
GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(target);
if (rt->needsResolve()) {
GrAssert(GrGLCaps::kNone_MSFBOType != this->glCaps().msFBOType());
GrAssert(rt->textureFBOID() != rt->renderFBOID());
GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER,
rt->renderFBOID()));
GL_CALL(BindFramebuffer(GR_GL_DRAW_FRAMEBUFFER,
rt->textureFBOID()));
// make sure we go through flushRenderTarget() since we've modified
// the bound DRAW FBO ID.
fHWBoundRenderTarget = NULL;
const GrGLIRect& vp = rt->getViewport();
const GrIRect dirtyRect = rt->getResolveRect();
GrGLIRect r;
r.setRelativeTo(vp, dirtyRect.fLeft, dirtyRect.fTop,
dirtyRect.width(), dirtyRect.height());
GrAutoTRestore<ScissorState> asr;
if (GrGLCaps::kAppleES_MSFBOType == this->glCaps().msFBOType()) {
// Apple's extension uses the scissor as the blit bounds.
asr.reset(&fScissorState);
fScissorState.fEnabled = true;
fScissorState.fRect = dirtyRect;
this->flushScissor();
GL_CALL(ResolveMultisampleFramebuffer());
} else {
if (GrGLCaps::kDesktopARB_MSFBOType != this->glCaps().msFBOType()) {
// this respects the scissor during the blit, so disable it.
GrAssert(GrGLCaps::kDesktopEXT_MSFBOType ==
this->glCaps().msFBOType());
asr.reset(&fScissorState);
fScissorState.fEnabled = false;
this->flushScissor();
}
int right = r.fLeft + r.fWidth;
int top = r.fBottom + r.fHeight;
GL_CALL(BlitFramebuffer(r.fLeft, r.fBottom, right, top,
r.fLeft, r.fBottom, right, top,
GR_GL_COLOR_BUFFER_BIT, GR_GL_NEAREST));
}
rt->flagAsResolved();
}
}
namespace {
GrGLenum gr_to_gl_stencil_func(GrStencilFunc basicFunc) {
static const GrGLenum gTable[] = {
GR_GL_ALWAYS, // kAlways_StencilFunc
GR_GL_NEVER, // kNever_StencilFunc
GR_GL_GREATER, // kGreater_StencilFunc
GR_GL_GEQUAL, // kGEqual_StencilFunc
GR_GL_LESS, // kLess_StencilFunc
GR_GL_LEQUAL, // kLEqual_StencilFunc,
GR_GL_EQUAL, // kEqual_StencilFunc,
GR_GL_NOTEQUAL, // kNotEqual_StencilFunc,
};
GR_STATIC_ASSERT(GR_ARRAY_COUNT(gTable) == kBasicStencilFuncCount);
GR_STATIC_ASSERT(0 == kAlways_StencilFunc);
GR_STATIC_ASSERT(1 == kNever_StencilFunc);
GR_STATIC_ASSERT(2 == kGreater_StencilFunc);
GR_STATIC_ASSERT(3 == kGEqual_StencilFunc);
GR_STATIC_ASSERT(4 == kLess_StencilFunc);
GR_STATIC_ASSERT(5 == kLEqual_StencilFunc);
GR_STATIC_ASSERT(6 == kEqual_StencilFunc);
GR_STATIC_ASSERT(7 == kNotEqual_StencilFunc);
GrAssert((unsigned) basicFunc < kBasicStencilFuncCount);
return gTable[basicFunc];
}
GrGLenum gr_to_gl_stencil_op(GrStencilOp op) {
static const GrGLenum gTable[] = {
GR_GL_KEEP, // kKeep_StencilOp
GR_GL_REPLACE, // kReplace_StencilOp
GR_GL_INCR_WRAP, // kIncWrap_StencilOp
GR_GL_INCR, // kIncClamp_StencilOp
GR_GL_DECR_WRAP, // kDecWrap_StencilOp
GR_GL_DECR, // kDecClamp_StencilOp
GR_GL_ZERO, // kZero_StencilOp
GR_GL_INVERT, // kInvert_StencilOp
};
GR_STATIC_ASSERT(GR_ARRAY_COUNT(gTable) == kStencilOpCount);
GR_STATIC_ASSERT(0 == kKeep_StencilOp);
GR_STATIC_ASSERT(1 == kReplace_StencilOp);
GR_STATIC_ASSERT(2 == kIncWrap_StencilOp);
GR_STATIC_ASSERT(3 == kIncClamp_StencilOp);
GR_STATIC_ASSERT(4 == kDecWrap_StencilOp);
GR_STATIC_ASSERT(5 == kDecClamp_StencilOp);
GR_STATIC_ASSERT(6 == kZero_StencilOp);
GR_STATIC_ASSERT(7 == kInvert_StencilOp);
GrAssert((unsigned) op < kStencilOpCount);
return gTable[op];
}
void set_gl_stencil(const GrGLInterface* gl,
const GrStencilSettings& settings,
GrGLenum glFace,
GrStencilSettings::Face grFace) {
GrGLenum glFunc = gr_to_gl_stencil_func(settings.func(grFace));
GrGLenum glFailOp = gr_to_gl_stencil_op(settings.failOp(grFace));
GrGLenum glPassOp = gr_to_gl_stencil_op(settings.passOp(grFace));
GrGLint ref = settings.funcRef(grFace);
GrGLint mask = settings.funcMask(grFace);
GrGLint writeMask = settings.writeMask(grFace);
if (GR_GL_FRONT_AND_BACK == glFace) {
// we call the combined func just in case separate stencil is not
// supported.
GR_GL_CALL(gl, StencilFunc(glFunc, ref, mask));
GR_GL_CALL(gl, StencilMask(writeMask));
GR_GL_CALL(gl, StencilOp(glFailOp, glPassOp, glPassOp));
} else {
GR_GL_CALL(gl, StencilFuncSeparate(glFace, glFunc, ref, mask));
GR_GL_CALL(gl, StencilMaskSeparate(glFace, writeMask));
GR_GL_CALL(gl, StencilOpSeparate(glFace, glFailOp, glPassOp, glPassOp));
}
}
}
void GrGpuGL::flushStencil(DrawType type) {
if (kStencilPath_DrawType == type) {
GrAssert(!fStencilSettings.isTwoSided());
// Just the func, ref, and mask is set here. The op and write mask are params to the call
// that draws the path to the SB (glStencilFillPath)
GrGLenum func =
gr_to_gl_stencil_func(fStencilSettings.func(GrStencilSettings::kFront_Face));
GL_CALL(PathStencilFunc(func,
fStencilSettings.funcRef(GrStencilSettings::kFront_Face),
fStencilSettings.funcMask(GrStencilSettings::kFront_Face)));
} else if (fHWStencilSettings != fStencilSettings) {
if (fStencilSettings.isDisabled()) {
if (kNo_TriState != fHWStencilTestEnabled) {
GL_CALL(Disable(GR_GL_STENCIL_TEST));
fHWStencilTestEnabled = kNo_TriState;
}
} else {
if (kYes_TriState != fHWStencilTestEnabled) {
GL_CALL(Enable(GR_GL_STENCIL_TEST));
fHWStencilTestEnabled = kYes_TriState;
}
}
if (!fStencilSettings.isDisabled()) {
if (this->getCaps().twoSidedStencilSupport()) {
set_gl_stencil(this->glInterface(),
fStencilSettings,
GR_GL_FRONT,
GrStencilSettings::kFront_Face);
set_gl_stencil(this->glInterface(),
fStencilSettings,
GR_GL_BACK,
GrStencilSettings::kBack_Face);
} else {
set_gl_stencil(this->glInterface(),
fStencilSettings,
GR_GL_FRONT_AND_BACK,
GrStencilSettings::kFront_Face);
}
}
fHWStencilSettings = fStencilSettings;
}
}
void GrGpuGL::flushAAState(DrawType type) {
const GrRenderTarget* rt = this->getDrawState().getRenderTarget();
if (kDesktop_GrGLBinding == this->glBinding()) {
// ES doesn't support toggling GL_MULTISAMPLE and doesn't have
// smooth lines.
// we prefer smooth lines over multisampled lines
bool smoothLines = false;
if (kDrawLines_DrawType == type) {
smoothLines = this->willUseHWAALines();
if (smoothLines) {
if (kYes_TriState != fHWAAState.fSmoothLineEnabled) {
GL_CALL(Enable(GR_GL_LINE_SMOOTH));
fHWAAState.fSmoothLineEnabled = kYes_TriState;
// must disable msaa to use line smoothing
if (rt->isMultisampled() &&
kNo_TriState != fHWAAState.fMSAAEnabled) {
GL_CALL(Disable(GR_GL_MULTISAMPLE));
fHWAAState.fMSAAEnabled = kNo_TriState;
}
}
} else {
if (kNo_TriState != fHWAAState.fSmoothLineEnabled) {
GL_CALL(Disable(GR_GL_LINE_SMOOTH));
fHWAAState.fSmoothLineEnabled = kNo_TriState;
}
}
}
if (!smoothLines && rt->isMultisampled()) {
// FIXME: GL_NV_pr doesn't seem to like MSAA disabled. The paths
// convex hulls of each segment appear to get filled.
bool enableMSAA = kStencilPath_DrawType == type ||
this->getDrawState().isHWAntialiasState();
if (enableMSAA) {
if (kYes_TriState != fHWAAState.fMSAAEnabled) {
GL_CALL(Enable(GR_GL_MULTISAMPLE));
fHWAAState.fMSAAEnabled = kYes_TriState;
}
} else {
if (kNo_TriState != fHWAAState.fMSAAEnabled) {
GL_CALL(Disable(GR_GL_MULTISAMPLE));
fHWAAState.fMSAAEnabled = kNo_TriState;
}
}
}
}
}
void GrGpuGL::flushBlend(bool isLines,
GrBlendCoeff srcCoeff,
GrBlendCoeff dstCoeff) {
if (isLines && this->willUseHWAALines()) {
if (kYes_TriState != fHWBlendState.fEnabled) {
GL_CALL(Enable(GR_GL_BLEND));
fHWBlendState.fEnabled = kYes_TriState;
}
if (kSA_GrBlendCoeff != fHWBlendState.fSrcCoeff ||
kISA_GrBlendCoeff != fHWBlendState.fDstCoeff) {
GL_CALL(BlendFunc(gXfermodeCoeff2Blend[kSA_GrBlendCoeff],
gXfermodeCoeff2Blend[kISA_GrBlendCoeff]));
fHWBlendState.fSrcCoeff = kSA_GrBlendCoeff;
fHWBlendState.fDstCoeff = kISA_GrBlendCoeff;
}
} else {
// any optimization to disable blending should
// have already been applied and tweaked the coeffs
// to (1, 0).
bool blendOff = kOne_GrBlendCoeff == srcCoeff &&
kZero_GrBlendCoeff == dstCoeff;
if (blendOff) {
if (kNo_TriState != fHWBlendState.fEnabled) {
GL_CALL(Disable(GR_GL_BLEND));
fHWBlendState.fEnabled = kNo_TriState;
}
} else {
if (kYes_TriState != fHWBlendState.fEnabled) {
GL_CALL(Enable(GR_GL_BLEND));
fHWBlendState.fEnabled = kYes_TriState;
}
if (fHWBlendState.fSrcCoeff != srcCoeff ||
fHWBlendState.fDstCoeff != dstCoeff) {
GL_CALL(BlendFunc(gXfermodeCoeff2Blend[srcCoeff],
gXfermodeCoeff2Blend[dstCoeff]));
fHWBlendState.fSrcCoeff = srcCoeff;
fHWBlendState.fDstCoeff = dstCoeff;
}
GrColor blendConst = this->getDrawState().getBlendConstant();
if ((BlendCoeffReferencesConstant(srcCoeff) ||
BlendCoeffReferencesConstant(dstCoeff)) &&
(!fHWBlendState.fConstColorValid ||
fHWBlendState.fConstColor != blendConst)) {
GrGLfloat c[4];
GrColorToRGBAFloat(blendConst, c);
GL_CALL(BlendColor(c[0], c[1], c[2], c[3]));
fHWBlendState.fConstColor = blendConst;
fHWBlendState.fConstColorValid = true;
}
}
}
}
namespace {
inline void set_tex_swizzle(GrGLenum swizzle[4], const GrGLInterface* gl) {
GR_GL_CALL(gl, TexParameteriv(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_SWIZZLE_RGBA,
reinterpret_cast<const GrGLint*>(swizzle)));
}
inline GrGLenum tile_to_gl_wrap(SkShader::TileMode tm) {
static const GrGLenum gWrapModes[] = {
GR_GL_CLAMP_TO_EDGE,
GR_GL_REPEAT,
GR_GL_MIRRORED_REPEAT
};
GrAssert((unsigned) tm <= SK_ARRAY_COUNT(gWrapModes));
GR_STATIC_ASSERT(0 == SkShader::kClamp_TileMode);
GR_STATIC_ASSERT(1 == SkShader::kRepeat_TileMode);
GR_STATIC_ASSERT(2 == SkShader::kMirror_TileMode);
return gWrapModes[tm];
}
}
void GrGpuGL::bindTexture(int unitIdx, const GrTextureParams& params, GrGLTexture* texture) {
GrAssert(NULL != texture);
// If we created a rt/tex and rendered to it without using a texture and now we're texturing
// from the rt it will still be the last bound texture, but it needs resolving. So keep this
// out of the "last != next" check.
GrGLRenderTarget* texRT = static_cast<GrGLRenderTarget*>(texture->asRenderTarget());
if (NULL != texRT) {
this->onResolveRenderTarget(texRT);
}
if (fHWBoundTextures[unitIdx] != texture) {
this->setTextureUnit(unitIdx);
GL_CALL(BindTexture(GR_GL_TEXTURE_2D, texture->textureID()));
fHWBoundTextures[unitIdx] = texture;
}
ResetTimestamp timestamp;
const GrGLTexture::TexParams& oldTexParams = texture->getCachedTexParams(&timestamp);
bool setAll = timestamp < this->getResetTimestamp();
GrGLTexture::TexParams newTexParams;
newTexParams.fFilter = params.isBilerp() ? GR_GL_LINEAR : GR_GL_NEAREST;
newTexParams.fWrapS = tile_to_gl_wrap(params.getTileModeX());
newTexParams.fWrapT = tile_to_gl_wrap(params.getTileModeY());
memcpy(newTexParams.fSwizzleRGBA,
GrGLShaderBuilder::GetTexParamSwizzle(texture->config(), this->glCaps()),
sizeof(newTexParams.fSwizzleRGBA));
if (setAll || newTexParams.fFilter != oldTexParams.fFilter) {
this->setTextureUnit(unitIdx);
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_MAG_FILTER,
newTexParams.fFilter));
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_MIN_FILTER,
newTexParams.fFilter));
}
if (setAll || newTexParams.fWrapS != oldTexParams.fWrapS) {
this->setTextureUnit(unitIdx);
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_WRAP_S,
newTexParams.fWrapS));
}
if (setAll || newTexParams.fWrapT != oldTexParams.fWrapT) {
this->setTextureUnit(unitIdx);
GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
GR_GL_TEXTURE_WRAP_T,
newTexParams.fWrapT));
}
if (this->glCaps().textureSwizzleSupport() &&
(setAll || memcmp(newTexParams.fSwizzleRGBA,
oldTexParams.fSwizzleRGBA,
sizeof(newTexParams.fSwizzleRGBA)))) {
this->setTextureUnit(unitIdx);
set_tex_swizzle(newTexParams.fSwizzleRGBA,
this->glInterface());
}
texture->setCachedTexParams(newTexParams, this->getResetTimestamp());
}
void GrGpuGL::flushMiscFixedFunctionState() {
const GrDrawState& drawState = this->getDrawState();
if (drawState.isDitherState()) {
if (kYes_TriState != fHWDitherEnabled) {
GL_CALL(Enable(GR_GL_DITHER));
fHWDitherEnabled = kYes_TriState;
}
} else {
if (kNo_TriState != fHWDitherEnabled) {
GL_CALL(Disable(GR_GL_DITHER));
fHWDitherEnabled = kNo_TriState;
}
}
if (drawState.isColorWriteDisabled()) {
if (kNo_TriState != fHWWriteToColor) {
GL_CALL(ColorMask(GR_GL_FALSE, GR_GL_FALSE,
GR_GL_FALSE, GR_GL_FALSE));
fHWWriteToColor = kNo_TriState;
}
} else {
if (kYes_TriState != fHWWriteToColor) {
GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
fHWWriteToColor = kYes_TriState;
}
}
if (fHWDrawFace != drawState.getDrawFace()) {
switch (this->getDrawState().getDrawFace()) {
case GrDrawState::kCCW_DrawFace:
GL_CALL(Enable(GR_GL_CULL_FACE));
GL_CALL(CullFace(GR_GL_BACK));
break;
case GrDrawState::kCW_DrawFace:
GL_CALL(Enable(GR_GL_CULL_FACE));
GL_CALL(CullFace(GR_GL_FRONT));
break;
case GrDrawState::kBoth_DrawFace:
GL_CALL(Disable(GR_GL_CULL_FACE));
break;
default:
GrCrash("Unknown draw face.");
}
fHWDrawFace = drawState.getDrawFace();
}
}
void GrGpuGL::notifyVertexBufferBind(const GrGLVertexBuffer* buffer) {
if (fHWGeometryState.fVertexBuffer != buffer) {
fHWGeometryState.fArrayPtrsDirty = true;
fHWGeometryState.fVertexBuffer = buffer;
}
}
void GrGpuGL::notifyVertexBufferDelete(const GrGLVertexBuffer* buffer) {
if (fHWGeometryState.fVertexBuffer == buffer) {
// deleting bound buffer does implied bind to 0
fHWGeometryState.fVertexBuffer = NULL;
fHWGeometryState.fArrayPtrsDirty = true;
}
}
void GrGpuGL::notifyIndexBufferBind(const GrGLIndexBuffer* buffer) {
fHWGeometryState.fIndexBuffer = buffer;
}
void GrGpuGL::notifyIndexBufferDelete(const GrGLIndexBuffer* buffer) {
if (fHWGeometryState.fIndexBuffer == buffer) {
// deleting bound buffer does implied bind to 0
fHWGeometryState.fIndexBuffer = NULL;
}
}
void GrGpuGL::notifyRenderTargetDelete(GrRenderTarget* renderTarget) {
GrAssert(NULL != renderTarget);
if (fHWBoundRenderTarget == renderTarget) {
fHWBoundRenderTarget = NULL;
}
}
void GrGpuGL::notifyTextureDelete(GrGLTexture* texture) {
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
if (fHWBoundTextures[s] == texture) {
// deleting bound texture does implied bind to 0
fHWBoundTextures[s] = NULL;
}
}
}
bool GrGpuGL::configToGLFormats(GrPixelConfig config,
bool getSizedInternalFormat,
GrGLenum* internalFormat,
GrGLenum* externalFormat,
GrGLenum* externalType) {
GrGLenum dontCare;
if (NULL == internalFormat) {
internalFormat = &dontCare;
}
if (NULL == externalFormat) {
externalFormat = &dontCare;
}
if (NULL == externalType) {
externalType = &dontCare;
}
switch (config) {
case kRGBA_8888_GrPixelConfig:
*internalFormat = GR_GL_RGBA;
*externalFormat = GR_GL_RGBA;
if (getSizedInternalFormat) {
*internalFormat = GR_GL_RGBA8;
} else {
*internalFormat = GR_GL_RGBA;
}
*externalType = GR_GL_UNSIGNED_BYTE;
break;
case kBGRA_8888_GrPixelConfig:
if (!this->glCaps().bgraFormatSupport()) {
return false;
}
if (this->glCaps().bgraIsInternalFormat()) {
if (getSizedInternalFormat) {
*internalFormat = GR_GL_BGRA8;
} else {
*internalFormat = GR_GL_BGRA;
}
} else {
if (getSizedInternalFormat) {
*internalFormat = GR_GL_RGBA8;
} else {
*internalFormat = GR_GL_RGBA;
}
}
*externalFormat = GR_GL_BGRA;
*externalType = GR_GL_UNSIGNED_BYTE;
break;
case kRGB_565_GrPixelConfig:
*internalFormat = GR_GL_RGB;
*externalFormat = GR_GL_RGB;
if (getSizedInternalFormat) {
if (this->glBinding() == kDesktop_GrGLBinding) {
return false;
} else {
*internalFormat = GR_GL_RGB565;
}
} else {
*internalFormat = GR_GL_RGB;
}
*externalType = GR_GL_UNSIGNED_SHORT_5_6_5;
break;
case kRGBA_4444_GrPixelConfig:
*internalFormat = GR_GL_RGBA;
*externalFormat = GR_GL_RGBA;
if (getSizedInternalFormat) {
*internalFormat = GR_GL_RGBA4;
} else {
*internalFormat = GR_GL_RGBA;
}
*externalType = GR_GL_UNSIGNED_SHORT_4_4_4_4;
break;
case kIndex_8_GrPixelConfig:
if (this->getCaps().eightBitPaletteSupport()) {
*internalFormat = GR_GL_PALETTE8_RGBA8;
// glCompressedTexImage doesn't take external params
*externalFormat = GR_GL_PALETTE8_RGBA8;
// no sized/unsized internal format distinction here
*internalFormat = GR_GL_PALETTE8_RGBA8;
// unused with CompressedTexImage
*externalType = GR_GL_UNSIGNED_BYTE;
} else {
return false;
}
break;
case kAlpha_8_GrPixelConfig:
if (this->glCaps().textureRedSupport()) {
*internalFormat = GR_GL_RED;
*externalFormat = GR_GL_RED;
if (getSizedInternalFormat) {
*internalFormat = GR_GL_R8;
} else {
*internalFormat = GR_GL_RED;
}
*externalType = GR_GL_UNSIGNED_BYTE;
} else {
*internalFormat = GR_GL_ALPHA;
*externalFormat = GR_GL_ALPHA;
if (getSizedInternalFormat) {
*internalFormat = GR_GL_ALPHA8;
} else {
*internalFormat = GR_GL_ALPHA;
}
*externalType = GR_GL_UNSIGNED_BYTE;
}
break;
default:
return false;
}
return true;
}
void GrGpuGL::setTextureUnit(int unit) {
GrAssert(unit >= 0 && unit < GrDrawState::kNumStages);
if (fHWActiveTextureUnitIdx != unit) {
GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + unit));
fHWActiveTextureUnitIdx = unit;
}
}
void GrGpuGL::setSpareTextureUnit() {
if (fHWActiveTextureUnitIdx != (GR_GL_TEXTURE0 + SPARE_TEX_UNIT)) {
GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + SPARE_TEX_UNIT));
fHWActiveTextureUnitIdx = SPARE_TEX_UNIT;
}
}
void GrGpuGL::setBuffers(bool indexed,
int* extraVertexOffset,
int* extraIndexOffset) {
GrAssert(NULL != extraVertexOffset);
const GeometryPoolState& geoPoolState = this->getGeomPoolState();
GrGLVertexBuffer* vbuf;
switch (this->getGeomSrc().fVertexSrc) {
case kBuffer_GeometrySrcType:
*extraVertexOffset = 0;
vbuf = (GrGLVertexBuffer*) this->getGeomSrc().fVertexBuffer;
break;
case kArray_GeometrySrcType:
case kReserved_GeometrySrcType:
this->finalizeReservedVertices();
*extraVertexOffset = geoPoolState.fPoolStartVertex;
vbuf = (GrGLVertexBuffer*) geoPoolState.fPoolVertexBuffer;
break;
default:
vbuf = NULL; // suppress warning
GrCrash("Unknown geometry src type!");
}
GrAssert(NULL != vbuf);
GrAssert(!vbuf->isLocked());
if (fHWGeometryState.fVertexBuffer != vbuf) {
GL_CALL(BindBuffer(GR_GL_ARRAY_BUFFER, vbuf->bufferID()));
fHWGeometryState.fArrayPtrsDirty = true;
fHWGeometryState.fVertexBuffer = vbuf;
}
if (indexed) {
GrAssert(NULL != extraIndexOffset);
GrGLIndexBuffer* ibuf;
switch (this->getGeomSrc().fIndexSrc) {
case kBuffer_GeometrySrcType:
*extraIndexOffset = 0;
ibuf = (GrGLIndexBuffer*)this->getGeomSrc().fIndexBuffer;
break;
case kArray_GeometrySrcType:
case kReserved_GeometrySrcType:
this->finalizeReservedIndices();
*extraIndexOffset = geoPoolState.fPoolStartIndex;
ibuf = (GrGLIndexBuffer*) geoPoolState.fPoolIndexBuffer;
break;
default:
ibuf = NULL; // suppress warning
GrCrash("Unknown geometry src type!");
}
GrAssert(NULL != ibuf);
GrAssert(!ibuf->isLocked());
if (fHWGeometryState.fIndexBuffer != ibuf) {
GL_CALL(BindBuffer(GR_GL_ELEMENT_ARRAY_BUFFER, ibuf->bufferID()));
fHWGeometryState.fIndexBuffer = ibuf;
}
}
}