blob: 297e1fc1d9a944e761db4cf6950b65392c74b204 [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 "gl/GrGLInterface.h"
#include "GrGLUtil.h"
#include <stdio.h>
SK_DEFINE_INST_COUNT(GrGLInterface)
#if GR_GL_PER_GL_FUNC_CALLBACK
namespace {
void GrGLDefaultInterfaceCallback(const GrGLInterface*) {}
}
#endif
GrGLInterface::GrGLInterface() {
fBindingsExported = kNone_GrGLBinding;
#if GR_GL_PER_GL_FUNC_CALLBACK
fCallback = GrGLDefaultInterfaceCallback;
fCallbackData = 0;
#endif
}
bool GrGLInterface::validate(GrGLBinding binding) const {
// kNone must be 0 so that the check we're about to do can never succeed if
// binding == kNone.
GR_STATIC_ASSERT(kNone_GrGLBinding == 0);
if (0 == (binding & fBindingsExported)) {
return false;
}
// functions that are always required
if (NULL == fActiveTexture ||
NULL == fAttachShader ||
NULL == fBindAttribLocation ||
NULL == fBindBuffer ||
NULL == fBindTexture ||
NULL == fBlendFunc ||
NULL == fBlendColor || // -> GL >= 1.4, ES >= 2.0 or extension
NULL == fBufferData ||
NULL == fBufferSubData ||
NULL == fClear ||
NULL == fClearColor ||
NULL == fClearStencil ||
NULL == fColorMask ||
NULL == fCompileShader ||
NULL == fCreateProgram ||
NULL == fCreateShader ||
NULL == fCullFace ||
NULL == fDeleteBuffers ||
NULL == fDeleteProgram ||
NULL == fDeleteShader ||
NULL == fDeleteTextures ||
NULL == fDepthMask ||
NULL == fDisable ||
NULL == fDisableVertexAttribArray ||
NULL == fDrawArrays ||
NULL == fDrawElements ||
NULL == fEnable ||
NULL == fEnableVertexAttribArray ||
NULL == fFrontFace ||
NULL == fGenBuffers ||
NULL == fGenTextures ||
NULL == fGetBufferParameteriv ||
NULL == fGetError ||
NULL == fGetIntegerv ||
NULL == fGetProgramInfoLog ||
NULL == fGetProgramiv ||
NULL == fGetShaderInfoLog ||
NULL == fGetShaderiv ||
NULL == fGetString ||
NULL == fGetUniformLocation ||
NULL == fLinkProgram ||
NULL == fPixelStorei ||
NULL == fReadPixels ||
NULL == fScissor ||
NULL == fShaderSource ||
NULL == fStencilFunc ||
NULL == fStencilMask ||
NULL == fStencilOp ||
NULL == fTexImage2D ||
NULL == fTexParameteri ||
NULL == fTexParameteriv ||
NULL == fTexSubImage2D ||
NULL == fUniform1f ||
NULL == fUniform1i ||
NULL == fUniform1fv ||
NULL == fUniform1iv ||
NULL == fUniform2f ||
NULL == fUniform2i ||
NULL == fUniform2fv ||
NULL == fUniform2iv ||
NULL == fUniform3f ||
NULL == fUniform3i ||
NULL == fUniform3fv ||
NULL == fUniform3iv ||
NULL == fUniform4f ||
NULL == fUniform4i ||
NULL == fUniform4fv ||
NULL == fUniform4iv ||
NULL == fUniformMatrix2fv ||
NULL == fUniformMatrix3fv ||
NULL == fUniformMatrix4fv ||
NULL == fUseProgram ||
NULL == fVertexAttrib4fv ||
NULL == fVertexAttribPointer ||
NULL == fViewport ||
NULL == fBindFramebuffer ||
NULL == fBindRenderbuffer ||
NULL == fCheckFramebufferStatus ||
NULL == fDeleteFramebuffers ||
NULL == fDeleteRenderbuffers ||
NULL == fFinish ||
NULL == fFlush ||
NULL == fFramebufferRenderbuffer ||
NULL == fFramebufferTexture2D ||
NULL == fGetFramebufferAttachmentParameteriv ||
NULL == fGetRenderbufferParameteriv ||
NULL == fGenFramebuffers ||
NULL == fGenRenderbuffers ||
NULL == fRenderbufferStorage) {
return false;
}
const char* ext;
GrGLVersion glVer = GrGLGetVersion(this);
ext = (const char*)fGetString(GR_GL_EXTENSIONS);
// Now check that baseline ES/Desktop fns not covered above are present
// and that we have fn pointers for any advertised extensions that we will
// try to use.
// these functions are part of ES2, we assume they are available
// On the desktop we assume they are available if the extension
// is present or GL version is high enough.
if (kES2_GrGLBinding == binding) {
if (NULL == fStencilFuncSeparate ||
NULL == fStencilMaskSeparate ||
NULL == fStencilOpSeparate) {
return false;
}
} else if (kDesktop_GrGLBinding == binding) {
if (glVer >= GR_GL_VER(2,0)) {
if (NULL == fStencilFuncSeparate ||
NULL == fStencilMaskSeparate ||
NULL == fStencilOpSeparate) {
return false;
}
}
if (glVer >= GR_GL_VER(3,0) && NULL == fBindFragDataLocation) {
return false;
}
if (glVer >= GR_GL_VER(2,0) ||
GrGLHasExtensionFromString("GL_ARB_draw_buffers", ext)) {
if (NULL == fDrawBuffers) {
return false;
}
}
if (glVer >= GR_GL_VER(1,5) ||
GrGLHasExtensionFromString("GL_ARB_occlusion_query", ext)) {
if (NULL == fGenQueries ||
NULL == fDeleteQueries ||
NULL == fBeginQuery ||
NULL == fEndQuery ||
NULL == fGetQueryiv ||
NULL == fGetQueryObjectiv ||
NULL == fGetQueryObjectuiv) {
return false;
}
}
if (glVer >= GR_GL_VER(3,3) ||
GrGLHasExtensionFromString("GL_ARB_timer_query", ext) ||
GrGLHasExtensionFromString("GL_EXT_timer_query", ext)) {
if (NULL == fGetQueryObjecti64v ||
NULL == fGetQueryObjectui64v) {
return false;
}
}
if (glVer >= GR_GL_VER(3,3) ||
GrGLHasExtensionFromString("GL_ARB_timer_query", ext)) {
if (NULL == fQueryCounter) {
return false;
}
}
// The below two blocks are checks for functions used with
// GL_NV_path_rendering. We're not enforcing that they be non-NULL
// because they aren't actually called at this time.
if (false &&
(NULL == fMatrixMode ||
NULL == fLoadIdentity ||
NULL == fLoadMatrixf)) {
return false;
}
if (false && GrGLHasExtensionFromString("GL_NV_path_rendering", ext)) {
if (NULL == fPathCommands ||
NULL == fPathCoords ||
NULL == fPathSubCommands ||
NULL == fPathSubCoords ||
NULL == fPathString ||
NULL == fPathGlyphs ||
NULL == fPathGlyphRange ||
NULL == fWeightPaths ||
NULL == fCopyPath ||
NULL == fInterpolatePaths ||
NULL == fTransformPath ||
NULL == fPathParameteriv ||
NULL == fPathParameteri ||
NULL == fPathParameterfv ||
NULL == fPathParameterf ||
NULL == fPathDashArray ||
NULL == fGenPaths ||
NULL == fDeletePaths ||
NULL == fIsPath ||
NULL == fPathStencilFunc ||
NULL == fPathStencilDepthOffset ||
NULL == fStencilFillPath ||
NULL == fStencilStrokePath ||
NULL == fStencilFillPathInstanced ||
NULL == fStencilStrokePathInstanced ||
NULL == fPathCoverDepthFunc ||
NULL == fPathColorGen ||
NULL == fPathTexGen ||
NULL == fPathFogGen ||
NULL == fCoverFillPath ||
NULL == fCoverStrokePath ||
NULL == fCoverFillPathInstanced ||
NULL == fCoverStrokePathInstanced ||
NULL == fGetPathParameteriv ||
NULL == fGetPathParameterfv ||
NULL == fGetPathCommands ||
NULL == fGetPathCoords ||
NULL == fGetPathDashArray ||
NULL == fGetPathMetrics ||
NULL == fGetPathMetricRange ||
NULL == fGetPathSpacing ||
NULL == fGetPathColorGeniv ||
NULL == fGetPathColorGenfv ||
NULL == fGetPathTexGeniv ||
NULL == fGetPathTexGenfv ||
NULL == fIsPointInFillPath ||
NULL == fIsPointInStrokePath ||
NULL == fGetPathLength ||
NULL == fPointAlongPath) {
return false;
}
}
}
// optional function on desktop before 1.3
if (kDesktop_GrGLBinding != binding ||
(glVer >= GR_GL_VER(1,3) ||
GrGLHasExtensionFromString("GL_ARB_texture_compression", ext))) {
if (NULL == fCompressedTexImage2D) {
return false;
}
}
// part of desktop GL, but not ES
if (kDesktop_GrGLBinding == binding &&
(NULL == fLineWidth ||
NULL == fGetTexLevelParameteriv ||
NULL == fDrawBuffer ||
NULL == fReadBuffer)) {
return false;
}
// GL_EXT_texture_storage is part of desktop 4.2
// There is a desktop ARB extension and an ES+desktop EXT extension
if (kDesktop_GrGLBinding == binding) {
if (glVer >= GR_GL_VER(4,2) ||
GrGLHasExtensionFromString("GL_ARB_texture_storage", ext) ||
GrGLHasExtensionFromString("GL_EXT_texture_storage", ext)) {
if (NULL == fTexStorage2D) {
return false;
}
}
} else if (GrGLHasExtensionFromString("GL_EXT_texture_storage", ext)) {
if (NULL == fTexStorage2D) {
return false;
}
}
// FBO MSAA
if (kDesktop_GrGLBinding == binding) {
// GL 3.0 and the ARB extension have multisample + blit
if (glVer >= GR_GL_VER(3,0) || GrGLHasExtensionFromString("GL_ARB_framebuffer_object", ext)) {
if (NULL == fRenderbufferStorageMultisample ||
NULL == fBlitFramebuffer) {
return false;
}
} else {
if (GrGLHasExtensionFromString("GL_EXT_framebuffer_blit", ext) &&
NULL == fBlitFramebuffer) {
return false;
}
if (GrGLHasExtensionFromString("GL_EXT_framebuffer_multisample", ext) &&
NULL == fRenderbufferStorageMultisample) {
return false;
}
}
} else {
if (GrGLHasExtensionFromString("GL_CHROMIUM_framebuffer_multisample", ext)) {
if (NULL == fRenderbufferStorageMultisample ||
NULL == fBlitFramebuffer) {
return false;
}
}
if (GrGLHasExtensionFromString("GL_APPLE_framebuffer_multisample", ext)) {
if (NULL == fRenderbufferStorageMultisample ||
NULL == fResolveMultisampleFramebuffer) {
return false;
}
}
}
// On ES buffer mapping is an extension. On Desktop
// buffer mapping was part of original VBO extension
// which we require.
if (kDesktop_GrGLBinding == binding ||
GrGLHasExtensionFromString("GL_OES_mapbuffer", ext)) {
if (NULL == fMapBuffer ||
NULL == fUnmapBuffer) {
return false;
}
}
// Dual source blending
if (kDesktop_GrGLBinding == binding &&
(glVer >= GR_GL_VER(3,3) ||
GrGLHasExtensionFromString("GL_ARB_blend_func_extended", ext))) {
if (NULL == fBindFragDataLocationIndexed) {
return false;
}
}
return true;
}