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/*
* 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 "GrGLDefines.h"
#include "SkTDArray.h"
#include "GrGLNoOpInterface.h"
// Functions not declared in GrGLBogusInterface.h (not common with the Debug GL interface).
namespace { // added to suppress 'no previous prototype' warning
GrGLvoid GR_GL_FUNCTION_TYPE nullGLActiveTexture(GrGLenum texture) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLAttachShader(GrGLuint program, GrGLuint shader) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBeginQuery(GrGLenum target, GrGLuint id) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindAttribLocation(GrGLuint program, GrGLuint index, const char* name) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindTexture(GrGLenum target, GrGLuint texture) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferData(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLPixelStorei(GrGLenum pname, GrGLint param) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLReadPixels(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLUseProgram(GrGLuint program) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLViewport(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFramebuffer(GrGLenum target, GrGLuint framebuffer) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindRenderbuffer(GrGLenum target, GrGLuint renderbuffer) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteFramebuffers(GrGLsizei n, const GrGLuint *framebuffers) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteRenderbuffers(GrGLsizei n, const GrGLuint *renderbuffers) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferRenderbuffer(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferTexture2D(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level) {}
GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateProgram() {
static int gCurrID = 0;
return ++gCurrID;
}
GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateShader(GrGLenum type) {
static int gCurrID = 0;
return ++gCurrID;
}
// same delete used for shaders and programs
GrGLvoid GR_GL_FUNCTION_TYPE nullGLDelete(GrGLuint program) {
}
// In debug builds we do asserts that ensure we agree with GL about when a buffer
// is mapped.
static SkTDArray<GrGLuint> gMappedBuffers;
static GrGLuint gCurrArrayBuffer;
static GrGLuint gCurrElementArrayBuffer;
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindBuffer(GrGLenum target, GrGLuint buffer) {
switch (target) {
case GR_GL_ARRAY_BUFFER:
gCurrArrayBuffer = buffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
gCurrElementArrayBuffer = buffer;
break;
}
}
// deleting a bound buffer has the side effect of binding 0
GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteBuffers(GrGLsizei n, const GrGLuint* ids) {
for (int i = 0; i < n; ++i) {
if (ids[i] == gCurrArrayBuffer) {
gCurrArrayBuffer = 0;
}
if (ids[i] == gCurrElementArrayBuffer) {
gCurrElementArrayBuffer = 0;
}
for (int j = 0; j < gMappedBuffers.count(); ++j) {
if (gMappedBuffers[j] == ids[i]) {
gMappedBuffers.remove(j);
// don't break b/c we didn't check for dupes on insert
--j;
}
}
}
}
GrGLvoid* GR_GL_FUNCTION_TYPE nullGLMapBuffer(GrGLenum target, GrGLenum access) {
// We just reserve 32MB of RAM for all locks and hope its big enough
static SkAutoMalloc gBufferData(32 * (1 << 20));
GrGLuint buf = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
buf = gCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
buf = gCurrElementArrayBuffer;
break;
}
if (buf) {
*gMappedBuffers.append() = buf;
}
return gBufferData.get();
}
GrGLboolean GR_GL_FUNCTION_TYPE nullGLUnmapBuffer(GrGLenum target) {
GrGLuint buf = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
buf = gCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
buf = gCurrElementArrayBuffer;
break;
}
if (buf) {
for (int i = 0; i < gMappedBuffers.count(); ++i) {
if (gMappedBuffers[i] == buf) {
gMappedBuffers.remove(i);
// don't break b/c we didn't check for dupes on insert
--i;
}
}
}
return GR_GL_TRUE;
}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetBufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) {
switch (pname) {
case GR_GL_BUFFER_MAPPED: {
*params = GR_GL_FALSE;
GrGLuint buf = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
buf = gCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
buf = gCurrElementArrayBuffer;
break;
}
if (buf) {
for (int i = 0; i < gMappedBuffers.count(); ++i) {
if (gMappedBuffers[i] == buf) {
*params = GR_GL_TRUE;
break;
}
}
}
break; }
default:
GrCrash("Unexpected pname to GetBufferParamateriv");
break;
}
};
} // end anonymous namespace
const GrGLInterface* GrGLCreateNullInterface() {
// The gl functions are not context-specific so we create one global
// interface
static SkAutoTUnref<GrGLInterface> glInterface;
if (!glInterface.get()) {
GrGLInterface* interface = SkNEW(GrGLInterface);
glInterface.reset(interface);
interface->fBindingsExported = kDesktop_GrGLBinding;
interface->fActiveTexture = nullGLActiveTexture;
interface->fAttachShader = nullGLAttachShader;
interface->fBeginQuery = nullGLBeginQuery;
interface->fBindAttribLocation = nullGLBindAttribLocation;
interface->fBindBuffer = nullGLBindBuffer;
interface->fBindFragDataLocation = noOpGLBindFragDataLocation;
interface->fBindTexture = nullGLBindTexture;
interface->fBlendColor = noOpGLBlendColor;
interface->fBlendFunc = noOpGLBlendFunc;
interface->fBufferData = nullGLBufferData;
interface->fBufferSubData = noOpGLBufferSubData;
interface->fClear = noOpGLClear;
interface->fClearColor = noOpGLClearColor;
interface->fClearStencil = noOpGLClearStencil;
interface->fColorMask = noOpGLColorMask;
interface->fCompileShader = noOpGLCompileShader;
interface->fCompressedTexImage2D = noOpGLCompressedTexImage2D;
interface->fCreateProgram = nullGLCreateProgram;
interface->fCreateShader = nullGLCreateShader;
interface->fCullFace = noOpGLCullFace;
interface->fDeleteBuffers = nullGLDeleteBuffers;
interface->fDeleteProgram = nullGLDelete;
interface->fDeleteQueries = noOpGLDeleteIds;
interface->fDeleteShader = nullGLDelete;
interface->fDeleteTextures = noOpGLDeleteIds;
interface->fDepthMask = noOpGLDepthMask;
interface->fDisable = noOpGLDisable;
interface->fDisableVertexAttribArray = noOpGLDisableVertexAttribArray;
interface->fDrawArrays = noOpGLDrawArrays;
interface->fDrawBuffer = noOpGLDrawBuffer;
interface->fDrawBuffers = noOpGLDrawBuffers;
interface->fDrawElements = noOpGLDrawElements;
interface->fEnable = noOpGLEnable;
interface->fEnableVertexAttribArray = noOpGLEnableVertexAttribArray;
interface->fEndQuery = noOpGLEndQuery;
interface->fFinish = noOpGLFinish;
interface->fFlush = noOpGLFlush;
interface->fFrontFace = noOpGLFrontFace;
interface->fGenBuffers = noOpGLGenIds;
interface->fGenQueries = noOpGLGenIds;
interface->fGenTextures = noOpGLGenIds;
interface->fGetBufferParameteriv = nullGLGetBufferParameteriv;
interface->fGetError = noOpGLGetError;
interface->fGetIntegerv = noOpGLGetIntegerv;
interface->fGetQueryObjecti64v = noOpGLGetQueryObjecti64v;
interface->fGetQueryObjectiv = noOpGLGetQueryObjectiv;
interface->fGetQueryObjectui64v = noOpGLGetQueryObjectui64v;
interface->fGetQueryObjectuiv = noOpGLGetQueryObjectuiv;
interface->fGetQueryiv = noOpGLGetQueryiv;
interface->fGetProgramInfoLog = noOpGLGetInfoLog;
interface->fGetProgramiv = noOpGLGetShaderOrProgramiv;
interface->fGetShaderInfoLog = noOpGLGetInfoLog;
interface->fGetShaderiv = noOpGLGetShaderOrProgramiv;
interface->fGetString = noOpGLGetString;
interface->fGetStringi = noOpGLGetStringi;
interface->fGetTexLevelParameteriv = noOpGLGetTexLevelParameteriv;
interface->fGetUniformLocation = noOpGLGetUniformLocation;
interface->fLineWidth = noOpGLLineWidth;
interface->fLinkProgram = noOpGLLinkProgram;
interface->fPixelStorei = nullGLPixelStorei;
interface->fQueryCounter = noOpGLQueryCounter;
interface->fReadBuffer = noOpGLReadBuffer;
interface->fReadPixels = nullGLReadPixels;
interface->fScissor = noOpGLScissor;
interface->fShaderSource = noOpGLShaderSource;
interface->fStencilFunc = noOpGLStencilFunc;
interface->fStencilFuncSeparate = noOpGLStencilFuncSeparate;
interface->fStencilMask = noOpGLStencilMask;
interface->fStencilMaskSeparate = noOpGLStencilMaskSeparate;
interface->fStencilOp = noOpGLStencilOp;
interface->fStencilOpSeparate = noOpGLStencilOpSeparate;
interface->fTexImage2D = noOpGLTexImage2D;
interface->fTexParameteri = noOpGLTexParameteri;
interface->fTexParameteriv = noOpGLTexParameteriv;
interface->fTexSubImage2D = noOpGLTexSubImage2D;
interface->fTexStorage2D = noOpGLTexStorage2D;
interface->fUniform1f = noOpGLUniform1f;
interface->fUniform1i = noOpGLUniform1i;
interface->fUniform1fv = noOpGLUniform1fv;
interface->fUniform1iv = noOpGLUniform1iv;
interface->fUniform2f = noOpGLUniform2f;
interface->fUniform2i = noOpGLUniform2i;
interface->fUniform2fv = noOpGLUniform2fv;
interface->fUniform2iv = noOpGLUniform2iv;
interface->fUniform3f = noOpGLUniform3f;
interface->fUniform3i = noOpGLUniform3i;
interface->fUniform3fv = noOpGLUniform3fv;
interface->fUniform3iv = noOpGLUniform3iv;
interface->fUniform4f = noOpGLUniform4f;
interface->fUniform4i = noOpGLUniform4i;
interface->fUniform4fv = noOpGLUniform4fv;
interface->fUniform4iv = noOpGLUniform4iv;
interface->fUniformMatrix2fv = noOpGLUniformMatrix2fv;
interface->fUniformMatrix3fv = noOpGLUniformMatrix3fv;
interface->fUniformMatrix4fv = noOpGLUniformMatrix4fv;
interface->fUseProgram = nullGLUseProgram;
interface->fVertexAttrib4fv = noOpGLVertexAttrib4fv;
interface->fVertexAttribPointer = noOpGLVertexAttribPointer;
interface->fViewport = nullGLViewport;
interface->fBindFramebuffer = nullGLBindFramebuffer;
interface->fBindRenderbuffer = nullGLBindRenderbuffer;
interface->fCheckFramebufferStatus = noOpGLCheckFramebufferStatus;
interface->fDeleteFramebuffers = nullGLDeleteFramebuffers;
interface->fDeleteRenderbuffers = nullGLDeleteRenderbuffers;
interface->fFramebufferRenderbuffer = nullGLFramebufferRenderbuffer;
interface->fFramebufferTexture2D = nullGLFramebufferTexture2D;
interface->fGenFramebuffers = noOpGLGenIds;
interface->fGenRenderbuffers = noOpGLGenIds;
interface->fGetFramebufferAttachmentParameteriv = noOpGLGetFramebufferAttachmentParameteriv;
interface->fGetRenderbufferParameteriv = noOpGLGetRenderbufferParameteriv;
interface->fRenderbufferStorage = noOpGLRenderbufferStorage;
interface->fRenderbufferStorageMultisample = noOpGLRenderbufferStorageMultisample;
interface->fBlitFramebuffer = noOpGLBlitFramebuffer;
interface->fResolveMultisampleFramebuffer = noOpGLResolveMultisampleFramebuffer;
interface->fMapBuffer = nullGLMapBuffer;
interface->fUnmapBuffer = nullGLUnmapBuffer;
interface->fBindFragDataLocationIndexed = noOpGLBindFragDataLocationIndexed;
}
glInterface.get()->ref();
return glInterface.get();
}
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