blob: c86a0bd2fd87548f78b371f978525cf5f0fbf417 [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 "GrGLDefines.h"
#include "SkTDArray.h"
#include "GrGLNoOpInterface.h"
#include "SkTLS.h"
// TODO: Delete this file after chrome starts using SkNullGLContext.
// added to suppress 'no previous prototype' warning and because this code is duplicated in
// SkNullGLContext.cpp
namespace {
class BufferObj {
public:
SK_DECLARE_INST_COUNT(BufferObj);
BufferObj(GrGLuint id) : fID(id), fDataPtr(NULL), fSize(0), fMapped(false) {
}
~BufferObj() { SkDELETE_ARRAY(fDataPtr); }
void allocate(GrGLsizeiptr size, const GrGLchar* dataPtr) {
if (fDataPtr) {
SkASSERT(0 != fSize);
SkDELETE_ARRAY(fDataPtr);
}
fSize = size;
fDataPtr = SkNEW_ARRAY(char, size);
}
GrGLuint id() const { return fID; }
GrGLchar* dataPtr() { return fDataPtr; }
GrGLsizeiptr size() const { return fSize; }
void setMapped(bool mapped) { fMapped = mapped; }
bool mapped() const { return fMapped; }
private:
GrGLuint fID;
GrGLchar* fDataPtr;
GrGLsizeiptr fSize; // size in bytes
bool fMapped;
};
// This class maintains a sparsely populated array of buffer pointers.
class BufferManager {
public:
SK_DECLARE_INST_COUNT(BufferManager);
BufferManager() : fFreeListHead(kFreeListEnd) {}
~BufferManager() {
// NULL out the entries that are really free list links rather than ptrs before deleting.
intptr_t curr = fFreeListHead;
while (kFreeListEnd != curr) {
intptr_t next = reinterpret_cast<intptr_t>(fBuffers[SkToS32(curr)]);
fBuffers[SkToS32(curr)] = NULL;
curr = next;
}
fBuffers.deleteAll();
}
BufferObj* lookUp(GrGLuint id) {
BufferObj* buffer = fBuffers[id];
SkASSERT(buffer && buffer->id() == id);
return buffer;
}
BufferObj* create() {
GrGLuint id;
BufferObj* buffer;
if (kFreeListEnd == fFreeListHead) {
// no free slots - create a new one
id = fBuffers.count();
buffer = SkNEW_ARGS(BufferObj, (id));
*fBuffers.append() = buffer;
} else {
// grab the head of the free list and advance the head to the next free slot.
id = static_cast<GrGLuint>(fFreeListHead);
fFreeListHead = reinterpret_cast<intptr_t>(fBuffers[id]);
buffer = SkNEW_ARGS(BufferObj, (id));
fBuffers[id] = buffer;
}
return buffer;
}
void free(BufferObj* buffer) {
SkASSERT(fBuffers.count() > 0);
GrGLuint id = buffer->id();
SkDELETE(buffer);
fBuffers[id] = reinterpret_cast<BufferObj*>(fFreeListHead);
fFreeListHead = id;
}
private:
static const intptr_t kFreeListEnd = -1;
// Index of the first entry of fBuffers in the free list. Free slots in fBuffers are indices to
// the next free slot. The last free slot has a value of kFreeListEnd.
intptr_t fFreeListHead;
SkTDArray<BufferObj*> fBuffers;
};
/**
* The global-to-thread state object for the null interface. All null interfaces on the
* same thread currently share one of these. This means two null contexts on the same thread
* can interfere with each other. It may make sense to more integrate this into SkNullGLContext
* and use it's makeCurrent mechanism.
*/
struct ThreadContext {
public:
SK_DECLARE_INST_COUNT(ThreadContext);
BufferManager fBufferManager;
GrGLuint fCurrArrayBuffer;
GrGLuint fCurrElementArrayBuffer;
GrGLuint fCurrProgramID;
GrGLuint fCurrShaderID;
static ThreadContext* Get() {
return reinterpret_cast<ThreadContext*>(SkTLS::Get(Create, Delete));
}
ThreadContext()
: fCurrArrayBuffer(0)
, fCurrElementArrayBuffer(0)
, fCurrProgramID(0)
, fCurrShaderID(0) {}
private:
static void* Create() { return SkNEW(ThreadContext ); }
static void Delete(void* context) { SkDELETE(reinterpret_cast<ThreadContext *>(context)); }
};
// Functions not declared in GrGLBogusInterface.h (not common with the Debug GL interface).
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 nullGLBindVertexArray(GrGLuint id) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLGenBuffers(GrGLsizei n, GrGLuint* ids) {
ThreadContext* ctx = ThreadContext::Get();
for (int i = 0; i < n; ++i) {
BufferObj* buffer = ctx->fBufferManager.create();
ids[i] = buffer->id();
}
}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLGenerateMipmap(GrGLenum target) {}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferData(GrGLenum target,
GrGLsizeiptr size,
const GrGLvoid* data,
GrGLenum usage) {
ThreadContext* ctx = ThreadContext::Get();
GrGLuint id = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
id = ctx->fCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
id = ctx->fCurrElementArrayBuffer;
break;
default:
SkFAIL("Unexpected target to nullGLBufferData");
break;
}
if (id > 0) {
BufferObj* buffer = ctx->fBufferManager.lookUp(id);
buffer->allocate(size, (const GrGLchar*) data);
}
}
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() {
return ++ThreadContext::Get()->fCurrProgramID;
}
GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateShader(GrGLenum type) {
return ++ThreadContext::Get()->fCurrShaderID;
}
// same delete used for shaders and programs
GrGLvoid GR_GL_FUNCTION_TYPE nullGLDelete(GrGLuint program) {
}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindBuffer(GrGLenum target, GrGLuint buffer) {
ThreadContext* ctx = ThreadContext::Get();
switch (target) {
case GR_GL_ARRAY_BUFFER:
ctx->fCurrArrayBuffer = buffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
ctx->fCurrElementArrayBuffer = buffer;
break;
}
}
// deleting a bound buffer has the side effect of binding 0
GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteBuffers(GrGLsizei n, const GrGLuint* ids) {
ThreadContext* ctx = ThreadContext::Get();
for (int i = 0; i < n; ++i) {
if (ids[i] == ctx->fCurrArrayBuffer) {
ctx->fCurrArrayBuffer = 0;
}
if (ids[i] == ctx->fCurrElementArrayBuffer) {
ctx->fCurrElementArrayBuffer = 0;
}
BufferObj* buffer = ctx->fBufferManager.lookUp(ids[i]);
ctx->fBufferManager.free(buffer);
}
}
GrGLvoid* GR_GL_FUNCTION_TYPE nullGLMapBufferRange(GrGLenum target, GrGLintptr offset,
GrGLsizeiptr length, GrGLbitfield access) {
ThreadContext* ctx = ThreadContext::Get();
GrGLuint id = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
id = ctx->fCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
id = ctx->fCurrElementArrayBuffer;
break;
}
if (id > 0) {
// We just ignore the offset and length here.
BufferObj* buffer = ctx->fBufferManager.lookUp(id);
SkASSERT(!buffer->mapped());
buffer->setMapped(true);
return buffer->dataPtr();
}
return NULL;
}
GrGLvoid* GR_GL_FUNCTION_TYPE nullGLMapBuffer(GrGLenum target, GrGLenum access) {
ThreadContext* ctx = ThreadContext::Get();
GrGLuint id = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
id = ctx->fCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
id = ctx->fCurrElementArrayBuffer;
break;
}
if (id > 0) {
BufferObj* buffer = ctx->fBufferManager.lookUp(id);
SkASSERT(!buffer->mapped());
buffer->setMapped(true);
return buffer->dataPtr();
}
SkASSERT(false);
return NULL; // no buffer bound to target
}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLFlushMappedBufferRange(GrGLenum target,
GrGLintptr offset,
GrGLsizeiptr length) {}
GrGLboolean GR_GL_FUNCTION_TYPE nullGLUnmapBuffer(GrGLenum target) {
ThreadContext* ctx = ThreadContext::Get();
GrGLuint id = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
id = ctx->fCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
id = ctx->fCurrElementArrayBuffer;
break;
}
if (id > 0) {
BufferObj* buffer = ctx->fBufferManager.lookUp(id);
SkASSERT(buffer->mapped());
buffer->setMapped(false);
return GR_GL_TRUE;
}
GrAlwaysAssert(false);
return GR_GL_FALSE; // GR_GL_INVALID_OPERATION;
}
GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetBufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) {
ThreadContext* ctx = ThreadContext::Get();
switch (pname) {
case GR_GL_BUFFER_MAPPED: {
*params = GR_GL_FALSE;
GrGLuint id = 0;
switch (target) {
case GR_GL_ARRAY_BUFFER:
id = ctx->fCurrArrayBuffer;
break;
case GR_GL_ELEMENT_ARRAY_BUFFER:
id = ctx->fCurrElementArrayBuffer;
break;
}
if (id > 0) {
BufferObj* buffer = ctx->fBufferManager.lookUp(id);
if (buffer->mapped()) {
*params = GR_GL_TRUE;
}
}
break; }
default:
SkFAIL("Unexpected pname to GetBufferParamateriv");
break;
}
};
} // end anonymous namespace
const GrGLInterface* GrGLCreateNullInterface() {
GrGLInterface* interface = SkNEW(GrGLInterface);
interface->fStandard = kGL_GrGLStandard;
GrGLInterface::Functions* functions = &interface->fFunctions;
functions->fActiveTexture = nullGLActiveTexture;
functions->fAttachShader = nullGLAttachShader;
functions->fBeginQuery = nullGLBeginQuery;
functions->fBindAttribLocation = nullGLBindAttribLocation;
functions->fBindBuffer = nullGLBindBuffer;
functions->fBindFragDataLocation = noOpGLBindFragDataLocation;
functions->fBindTexture = nullGLBindTexture;
functions->fBindVertexArray = nullGLBindVertexArray;
functions->fBlendColor = noOpGLBlendColor;
functions->fBlendFunc = noOpGLBlendFunc;
functions->fBufferData = nullGLBufferData;
functions->fBufferSubData = noOpGLBufferSubData;
functions->fClear = noOpGLClear;
functions->fClearColor = noOpGLClearColor;
functions->fClearStencil = noOpGLClearStencil;
functions->fColorMask = noOpGLColorMask;
functions->fCompileShader = noOpGLCompileShader;
functions->fCompressedTexImage2D = noOpGLCompressedTexImage2D;
functions->fCompressedTexSubImage2D = noOpGLCompressedTexSubImage2D;
functions->fCopyTexSubImage2D = noOpGLCopyTexSubImage2D;
functions->fCreateProgram = nullGLCreateProgram;
functions->fCreateShader = nullGLCreateShader;
functions->fCullFace = noOpGLCullFace;
functions->fDeleteBuffers = nullGLDeleteBuffers;
functions->fDeleteProgram = nullGLDelete;
functions->fDeleteQueries = noOpGLDeleteIds;
functions->fDeleteShader = nullGLDelete;
functions->fDeleteTextures = noOpGLDeleteIds;
functions->fDeleteVertexArrays = noOpGLDeleteIds;
functions->fDepthMask = noOpGLDepthMask;
functions->fDisable = noOpGLDisable;
functions->fDisableVertexAttribArray = noOpGLDisableVertexAttribArray;
functions->fDrawArrays = noOpGLDrawArrays;
functions->fDrawBuffer = noOpGLDrawBuffer;
functions->fDrawBuffers = noOpGLDrawBuffers;
functions->fDrawElements = noOpGLDrawElements;
functions->fEnable = noOpGLEnable;
functions->fEnableVertexAttribArray = noOpGLEnableVertexAttribArray;
functions->fEndQuery = noOpGLEndQuery;
functions->fFinish = noOpGLFinish;
functions->fFlush = noOpGLFlush;
functions->fFlushMappedBufferRange = nullGLFlushMappedBufferRange;
functions->fFrontFace = noOpGLFrontFace;
functions->fGenBuffers = nullGLGenBuffers;
functions->fGenerateMipmap = nullGLGenerateMipmap;
functions->fGenQueries = noOpGLGenIds;
functions->fGenTextures = noOpGLGenIds;
functions->fGenVertexArrays = noOpGLGenIds;
functions->fGetBufferParameteriv = nullGLGetBufferParameteriv;
functions->fGetError = noOpGLGetError;
functions->fGetIntegerv = noOpGLGetIntegerv;
functions->fGetQueryObjecti64v = noOpGLGetQueryObjecti64v;
functions->fGetQueryObjectiv = noOpGLGetQueryObjectiv;
functions->fGetQueryObjectui64v = noOpGLGetQueryObjectui64v;
functions->fGetQueryObjectuiv = noOpGLGetQueryObjectuiv;
functions->fGetQueryiv = noOpGLGetQueryiv;
functions->fGetProgramInfoLog = noOpGLGetInfoLog;
functions->fGetProgramiv = noOpGLGetShaderOrProgramiv;
functions->fGetShaderInfoLog = noOpGLGetInfoLog;
functions->fGetShaderiv = noOpGLGetShaderOrProgramiv;
functions->fGetString = noOpGLGetString;
functions->fGetStringi = noOpGLGetStringi;
functions->fGetTexLevelParameteriv = noOpGLGetTexLevelParameteriv;
functions->fGetUniformLocation = noOpGLGetUniformLocation;
functions->fInsertEventMarker = noOpGLInsertEventMarker;
functions->fLineWidth = noOpGLLineWidth;
functions->fLinkProgram = noOpGLLinkProgram;
functions->fMapBuffer = nullGLMapBuffer;
functions->fMapBufferRange = nullGLMapBufferRange;
functions->fPixelStorei = nullGLPixelStorei;
functions->fPopGroupMarker = noOpGLPopGroupMarker;
functions->fPushGroupMarker = noOpGLPushGroupMarker;
functions->fQueryCounter = noOpGLQueryCounter;
functions->fReadBuffer = noOpGLReadBuffer;
functions->fReadPixels = nullGLReadPixels;
functions->fScissor = noOpGLScissor;
functions->fShaderSource = noOpGLShaderSource;
functions->fStencilFunc = noOpGLStencilFunc;
functions->fStencilFuncSeparate = noOpGLStencilFuncSeparate;
functions->fStencilMask = noOpGLStencilMask;
functions->fStencilMaskSeparate = noOpGLStencilMaskSeparate;
functions->fStencilOp = noOpGLStencilOp;
functions->fStencilOpSeparate = noOpGLStencilOpSeparate;
functions->fTexImage2D = noOpGLTexImage2D;
functions->fTexParameteri = noOpGLTexParameteri;
functions->fTexParameteriv = noOpGLTexParameteriv;
functions->fTexSubImage2D = noOpGLTexSubImage2D;
functions->fTexStorage2D = noOpGLTexStorage2D;
functions->fDiscardFramebuffer = noOpGLDiscardFramebuffer;
functions->fUniform1f = noOpGLUniform1f;
functions->fUniform1i = noOpGLUniform1i;
functions->fUniform1fv = noOpGLUniform1fv;
functions->fUniform1iv = noOpGLUniform1iv;
functions->fUniform2f = noOpGLUniform2f;
functions->fUniform2i = noOpGLUniform2i;
functions->fUniform2fv = noOpGLUniform2fv;
functions->fUniform2iv = noOpGLUniform2iv;
functions->fUniform3f = noOpGLUniform3f;
functions->fUniform3i = noOpGLUniform3i;
functions->fUniform3fv = noOpGLUniform3fv;
functions->fUniform3iv = noOpGLUniform3iv;
functions->fUniform4f = noOpGLUniform4f;
functions->fUniform4i = noOpGLUniform4i;
functions->fUniform4fv = noOpGLUniform4fv;
functions->fUniform4iv = noOpGLUniform4iv;
functions->fUniformMatrix2fv = noOpGLUniformMatrix2fv;
functions->fUniformMatrix3fv = noOpGLUniformMatrix3fv;
functions->fUniformMatrix4fv = noOpGLUniformMatrix4fv;
functions->fUnmapBuffer = nullGLUnmapBuffer;
functions->fUseProgram = nullGLUseProgram;
functions->fVertexAttrib1f = noOpGLVertexAttrib1f;
functions->fVertexAttrib2fv = noOpGLVertexAttrib2fv;
functions->fVertexAttrib3fv = noOpGLVertexAttrib3fv;
functions->fVertexAttrib4fv = noOpGLVertexAttrib4fv;
functions->fVertexAttribPointer = noOpGLVertexAttribPointer;
functions->fViewport = nullGLViewport;
functions->fBindFramebuffer = nullGLBindFramebuffer;
functions->fBindRenderbuffer = nullGLBindRenderbuffer;
functions->fCheckFramebufferStatus = noOpGLCheckFramebufferStatus;
functions->fDeleteFramebuffers = nullGLDeleteFramebuffers;
functions->fDeleteRenderbuffers = nullGLDeleteRenderbuffers;
functions->fFramebufferRenderbuffer = nullGLFramebufferRenderbuffer;
functions->fFramebufferTexture2D = nullGLFramebufferTexture2D;
functions->fGenFramebuffers = noOpGLGenIds;
functions->fGenRenderbuffers = noOpGLGenIds;
functions->fGetFramebufferAttachmentParameteriv = noOpGLGetFramebufferAttachmentParameteriv;
functions->fGetRenderbufferParameteriv = noOpGLGetRenderbufferParameteriv;
functions->fRenderbufferStorage = noOpGLRenderbufferStorage;
functions->fRenderbufferStorageMultisample = noOpGLRenderbufferStorageMultisample;
functions->fBlitFramebuffer = noOpGLBlitFramebuffer;
functions->fResolveMultisampleFramebuffer = noOpGLResolveMultisampleFramebuffer;
functions->fMatrixLoadf = noOpGLMatrixLoadf;
functions->fMatrixLoadIdentity = noOpGLMatrixLoadIdentity;
functions->fBindFragDataLocationIndexed = noOpGLBindFragDataLocationIndexed;
interface->fExtensions.init(kGL_GrGLStandard, functions->fGetString, functions->fGetStringi,
functions->fGetIntegerv);
return interface;
}