blob: 3b8b1fec044ade61f6afdfe9d2f20e5e36c5df04 [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 "GrNonAtomicRef.h"
#include "gl/GrGLInterface.h"
#include "GrGLTestInterface.h"
#include "SkMutex.h"
#include "SkTDArray.h"
#include <type_traits>
// added to suppress 'no previous prototype' warning and because this code is duplicated in
// SkNullGLContext.cpp
namespace {
class GLObject : public GrNonAtomicRef<GLObject> {
public:
GLObject(GrGLuint id) : fID(id) {}
virtual ~GLObject() {}
GrGLuint id() const { return fID; }
private:
GrGLuint fID;
};
// This class maintains a sparsely populated array of object pointers.
template<typename T> class TGLObjectManager {
static_assert(std::is_convertible<T*, GLObject*>::value, "T must be a subclass of GLObject");
public:
TGLObjectManager() : fFreeListHead(kFreeListEnd) {
*fGLObjects.append() = nullptr; // 0 is not a valid GL object id.
}
~TGLObjectManager() {
// nullptr 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>(fGLObjects[SkToS32(curr)]);
fGLObjects[SkToS32(curr)] = nullptr;
curr = next;
}
fGLObjects.safeUnrefAll();
}
T* lookUp(GrGLuint id) {
T* object = fGLObjects[id];
SkASSERT(object && object->id() == id);
return object;
}
T* create() {
GrGLuint id;
T* object;
if (kFreeListEnd == fFreeListHead) {
// no free slots - create a new one
id = fGLObjects.count();
object = new T(id);
*fGLObjects.append() = object;
} 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>(fGLObjects[id]);
object = new T(id);
fGLObjects[id] = object;
}
return object;
}
void free(T* object) {
SkASSERT(object);
SkASSERT(fGLObjects.count() > 0);
GrGLuint id = object->id();
object->unref();
fGLObjects[id] = reinterpret_cast<T*>(fFreeListHead);
fFreeListHead = id;
}
private:
static const intptr_t kFreeListEnd = -1;
// Index of the first entry of fGLObjects in the free list. Free slots in fGLObjects are indices
// to the next free slot. The last free slot has a value of kFreeListEnd.
intptr_t fFreeListHead;
SkTDArray<T*> fGLObjects;
};
class Buffer : public GLObject {
public:
Buffer(GrGLuint id) : INHERITED(id), fDataPtr(nullptr), fSize(0), fMapped(false) {}
~Buffer() { delete[] fDataPtr; }
void allocate(GrGLsizeiptr size, const GrGLchar* dataPtr) {
if (fDataPtr) {
SkASSERT(0 != fSize);
delete[] fDataPtr;
}
fSize = size;
fDataPtr = new char[size];
}
GrGLchar* dataPtr() { return fDataPtr; }
GrGLsizeiptr size() const { return fSize; }
void setMapped(bool mapped) { fMapped = mapped; }
bool mapped() const { return fMapped; }
private:
GrGLchar* fDataPtr;
GrGLsizeiptr fSize; // size in bytes
bool fMapped;
typedef GLObject INHERITED;
};
class FramebufferAttachment : public GLObject {
public:
int numSamples() const { return fNumSamples; }
protected:
FramebufferAttachment(int id) : INHERITED(id), fNumSamples(1) {}
int fNumSamples;
typedef GLObject INHERITED;
};
class Renderbuffer : public FramebufferAttachment {
public:
Renderbuffer(int id) : INHERITED(id) {}
void setNumSamples(int numSamples) { fNumSamples = numSamples; }
private:
typedef FramebufferAttachment INHERITED;
};
class Texture : public FramebufferAttachment {
public:
Texture() : INHERITED(1) {}
private:
typedef FramebufferAttachment INHERITED;
};
class Framebuffer : public GLObject {
public:
Framebuffer(int id) : INHERITED(id) {}
void setAttachment(GrGLenum attachmentPoint, const FramebufferAttachment* attachment) {
switch (attachmentPoint) {
default:
SK_ABORT("Invalid framebuffer attachment.");
break;
case GR_GL_STENCIL_ATTACHMENT:
fAttachments[(int)AttachmentPoint::kStencil].reset(SkRef(attachment));
break;
case GR_GL_DEPTH_ATTACHMENT:
fAttachments[(int)AttachmentPoint::kDepth].reset(SkRef(attachment));
break;
case GR_GL_COLOR_ATTACHMENT0:
fAttachments[(int)AttachmentPoint::kColor].reset(SkRef(attachment));
break;
}
}
void notifyAttachmentDeleteWhileBound(const FramebufferAttachment* deleted) {
for (auto& attachment : fAttachments) {
if (attachment.get() == deleted) {
attachment.reset(nullptr);
}
}
}
int numSamples() const {
int numSamples = 0;
for (auto& attachment : fAttachments) {
if (!attachment) {
continue;
}
if (numSamples) {
GrAlwaysAssert(attachment->numSamples() == numSamples);
continue;
}
numSamples = attachment->numSamples();
}
GrAlwaysAssert(numSamples);
return numSamples;
}
private:
enum AttachmentPoint {
kStencil,
kDepth,
kColor
};
constexpr int static kNumAttachmentPoints = 1 + (int)AttachmentPoint::kColor;
sk_sp<const FramebufferAttachment> fAttachments[kNumAttachmentPoints];
typedef GLObject INHERITED;
};
/** Null interface implementation */
class NullInterface : public GrGLTestInterface {
public:
NullInterface(bool enableNVPR)
: fCurrDrawFramebuffer(0)
, fCurrReadFramebuffer(0)
, fCurrRenderbuffer(0)
, fCurrProgramID(0)
, fCurrShaderID(0)
, fCurrGenericID(0)
, fCurrUniformLocation(0)
, fCurrPathID(0) {
memset(fBoundBuffers, 0, sizeof(fBoundBuffers));
fAdvertisedExtensions.push_back("GL_ARB_framebuffer_object");
fAdvertisedExtensions.push_back("GL_ARB_blend_func_extended");
fAdvertisedExtensions.push_back("GL_ARB_timer_query");
fAdvertisedExtensions.push_back("GL_ARB_draw_buffers");
fAdvertisedExtensions.push_back("GL_ARB_occlusion_query");
fAdvertisedExtensions.push_back("GL_EXT_stencil_wrap");
if (enableNVPR) {
fAdvertisedExtensions.push_back("GL_NV_path_rendering");
fAdvertisedExtensions.push_back("GL_ARB_program_interface_query");
}
fAdvertisedExtensions.push_back(nullptr);
this->init(kGL_GrGLStandard);
}
GrGLenum checkFramebufferStatus(GrGLenum target) override {
return GR_GL_FRAMEBUFFER_COMPLETE;
}
GrGLvoid genBuffers(GrGLsizei n, GrGLuint* ids) override {
for (int i = 0; i < n; ++i) {
Buffer* buffer = fBufferManager.create();
ids[i] = buffer->id();
}
}
GrGLvoid bufferData(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data,
GrGLenum usage) override {
GrGLuint id = fBoundBuffers[GetBufferIndex(target)];
if (id > 0) {
Buffer* buffer = fBufferManager.lookUp(id);
buffer->allocate(size, (const GrGLchar*) data);
}
}
GrGLuint createProgram() override {
return ++fCurrProgramID;
}
GrGLuint createShader(GrGLenum type) override {
return ++fCurrShaderID;
}
GrGLvoid bindBuffer(GrGLenum target, GrGLuint buffer) override {
fBoundBuffers[GetBufferIndex(target)] = buffer;
}
// deleting a bound buffer has the side effect of binding 0
GrGLvoid deleteBuffers(GrGLsizei n, const GrGLuint* ids) override {
// First potentially unbind the buffers.
for (int buffIdx = 0; buffIdx < kNumBufferTargets; ++buffIdx) {
if (!fBoundBuffers[buffIdx]) {
continue;
}
for (int i = 0; i < n; ++i) {
if (ids[i] == fBoundBuffers[buffIdx]) {
fBoundBuffers[buffIdx] = 0;
break;
}
}
}
// Then actually "delete" the buffers.
for (int i = 0; i < n; ++i) {
if (ids[i] > 0) {
Buffer* buffer = fBufferManager.lookUp(ids[i]);
fBufferManager.free(buffer);
}
}
}
GrGLvoid genFramebuffers(GrGLsizei n, GrGLuint *framebuffers) override {
for (int i = 0; i < n; ++i) {
Framebuffer* framebuffer = fFramebufferManager.create();
framebuffers[i] = framebuffer->id();
}
}
GrGLvoid bindFramebuffer(GrGLenum target, GrGLuint framebuffer) override {
SkASSERT(GR_GL_FRAMEBUFFER == target || GR_GL_DRAW_FRAMEBUFFER == target ||
GR_GL_READ_FRAMEBUFFER == target);
if (GR_GL_READ_FRAMEBUFFER != target) {
fCurrDrawFramebuffer = framebuffer;
}
if (GR_GL_DRAW_FRAMEBUFFER != target) {
fCurrReadFramebuffer = framebuffer;
}
}
GrGLvoid deleteFramebuffers(GrGLsizei n, const GrGLuint* ids) override {
for (int i = 0; i < n; ++i) {
if (ids[i] == fCurrDrawFramebuffer) {
fCurrDrawFramebuffer = 0;
}
if (ids[i] == fCurrReadFramebuffer) {
fCurrReadFramebuffer = 0;
}
if (ids[i] > 0) {
Framebuffer* framebuffer = fFramebufferManager.lookUp(ids[i]);
fFramebufferManager.free(framebuffer);
}
}
}
GrGLvoid genQueries(GrGLsizei n, GrGLuint *ids) override { this->genGenericIds(n, ids); }
GrGLvoid genRenderbuffers(GrGLsizei n, GrGLuint *renderbuffers) override {
for (int i = 0; i < n; ++i) {
Renderbuffer* renderbuffer = fRenderbufferManager.create();
renderbuffers[i] = renderbuffer->id();
}
}
GrGLvoid bindRenderbuffer(GrGLenum target, GrGLuint renderbuffer) override {
SkASSERT(GR_GL_RENDERBUFFER == target);
fCurrRenderbuffer = renderbuffer;
}
GrGLvoid deleteRenderbuffers(GrGLsizei n, const GrGLuint* ids) override {
for (int i = 0; i < n; ++i) {
if (ids[i] <= 0) {
continue;
}
if (ids[i] == fCurrRenderbuffer) {
fCurrRenderbuffer = 0;
}
Renderbuffer* renderbuffer = fRenderbufferManager.lookUp(ids[i]);
if (fCurrDrawFramebuffer) {
Framebuffer* drawFramebuffer = fFramebufferManager.lookUp(fCurrDrawFramebuffer);
drawFramebuffer->notifyAttachmentDeleteWhileBound(renderbuffer);
}
if (fCurrReadFramebuffer) {
Framebuffer* readFramebuffer = fFramebufferManager.lookUp(fCurrReadFramebuffer);
readFramebuffer->notifyAttachmentDeleteWhileBound(renderbuffer);
}
fRenderbufferManager.free(renderbuffer);
}
}
GrGLvoid renderbufferStorage(GrGLenum target, GrGLenum internalformat, GrGLsizei width,
GrGLsizei height) override {
GrAlwaysAssert(GR_GL_RENDERBUFFER == target);
GrAlwaysAssert(fCurrRenderbuffer);
Renderbuffer* renderbuffer = fRenderbufferManager.lookUp(fCurrRenderbuffer);
renderbuffer->setNumSamples(1);
}
GrGLvoid renderbufferStorageMultisample(GrGLenum target, GrGLsizei samples,
GrGLenum internalformat, GrGLsizei width,
GrGLsizei height) override {
GrAlwaysAssert(GR_GL_RENDERBUFFER == target);
GrAlwaysAssert(samples > 0);
GrAlwaysAssert(fCurrRenderbuffer);
Renderbuffer* renderbuffer = fRenderbufferManager.lookUp(fCurrRenderbuffer);
renderbuffer->setNumSamples(samples);
}
GrGLvoid namedRenderbufferStorage(GrGLuint renderbuffer, GrGLenum GrGLinternalformat,
GrGLsizei width, GrGLsizei height) override {
SK_ABORT("Not implemented");
}
GrGLvoid namedRenderbufferStorageMultisample(GrGLuint renderbuffer, GrGLsizei samples,
GrGLenum GrGLinternalformat, GrGLsizei width,
GrGLsizei height) override {
SK_ABORT("Not implemented");
}
GrGLvoid framebufferRenderbuffer(GrGLenum target, GrGLenum attachment,
GrGLenum renderbuffertarget,
GrGLuint renderBufferID) override {
GrGLuint id = this->getBoundFramebufferID(target);
GrAlwaysAssert(id);
Framebuffer* framebuffer = fFramebufferManager.lookUp(id);
GrAlwaysAssert(GR_GL_RENDERBUFFER == renderbuffertarget);
GrAlwaysAssert(fCurrRenderbuffer);
Renderbuffer* renderbuffer = fRenderbufferManager.lookUp(fCurrRenderbuffer);
framebuffer->setAttachment(attachment, renderbuffer);
}
GrGLvoid namedFramebufferRenderbuffer(GrGLuint framebuffer, GrGLenum attachment,
GrGLenum renderbuffertarget,
GrGLuint renderbuffer) override {
SK_ABORT("Not implemented");
}
GrGLvoid genTextures(GrGLsizei n, GrGLuint *textures) override {
this->genGenericIds(n, textures);
}
GrGLvoid framebufferTexture2D(GrGLenum target, GrGLenum attachment, GrGLenum textarget,
GrGLuint textureID, GrGLint level) override {
GrGLuint id = this->getBoundFramebufferID(target);
GrAlwaysAssert(id);
Framebuffer* framebuffer = fFramebufferManager.lookUp(id);
framebuffer->setAttachment(attachment, this->getSingleTextureObject());
}
GrGLvoid framebufferTexture2DMultisample(GrGLenum target, GrGLenum attachment,
GrGLenum textarget, GrGLuint texture, GrGLint level,
GrGLsizei samples) override {
SK_ABORT("Not implemented");
}
GrGLvoid namedFramebufferTexture1D(GrGLuint framebuffer, GrGLenum attachment,
GrGLenum textarget, GrGLuint texture,
GrGLint level) override {
SK_ABORT("Not implemented");
}
GrGLvoid namedFramebufferTexture2D(GrGLuint framebuffer, GrGLenum attachment,
GrGLenum textarget, GrGLuint texture,
GrGLint level) override {
SK_ABORT("Not implemented");
}
GrGLvoid namedFramebufferTexture3D(GrGLuint framebuffer, GrGLenum attachment,
GrGLenum textarget, GrGLuint texture, GrGLint level,
GrGLint zoffset) override {
SK_ABORT("Not implemented");
}
GrGLvoid genVertexArrays(GrGLsizei n, GrGLuint *arrays) override {
this->genGenericIds(n, arrays);
}
GrGLenum getError() override { return GR_GL_NO_ERROR; }
GrGLvoid getIntegerv(GrGLenum pname, GrGLint* params) override {
// TODO: remove from Ganesh the #defines for gets we don't use.
// We would like to minimize gets overall due to performance issues
switch (pname) {
case GR_GL_CONTEXT_PROFILE_MASK:
*params = GR_GL_CONTEXT_COMPATIBILITY_PROFILE_BIT;
break;
case GR_GL_STENCIL_BITS:
*params = 8;
break;
case GR_GL_SAMPLES: {
GrAlwaysAssert(fCurrDrawFramebuffer);
Framebuffer* framebuffer = fFramebufferManager.lookUp(fCurrDrawFramebuffer);
*params = framebuffer->numSamples();
break;
}
case GR_GL_FRAMEBUFFER_BINDING:
*params = 0;
break;
case GR_GL_VIEWPORT:
params[0] = 0;
params[1] = 0;
params[2] = 800;
params[3] = 600;
break;
case GR_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
case GR_GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS:
case GR_GL_MAX_TEXTURE_IMAGE_UNITS:
case GR_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
*params = 8;
break;
case GR_GL_MAX_TEXTURE_COORDS:
*params = 8;
break;
case GR_GL_MAX_VERTEX_UNIFORM_VECTORS:
*params = kDefaultMaxVertexUniformVectors;
break;
case GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS:
*params = kDefaultMaxFragmentUniformVectors;
break;
case GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
*params = 16 * 4;
break;
case GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS:
*params = 0;
break;
case GR_GL_COMPRESSED_TEXTURE_FORMATS:
break;
case GR_GL_MAX_TEXTURE_SIZE:
*params = 8192;
break;
case GR_GL_MAX_RENDERBUFFER_SIZE:
*params = 8192;
break;
case GR_GL_MAX_SAMPLES:
*params = 32;
break;
case GR_GL_MAX_VERTEX_ATTRIBS:
*params = kDefaultMaxVertexAttribs;
break;
case GR_GL_MAX_VARYING_VECTORS:
*params = kDefaultMaxVaryingVectors;
break;
case GR_GL_NUM_EXTENSIONS: {
GrGLint i = 0;
while (fAdvertisedExtensions[i++]);
*params = i;
break;
}
default:
SK_ABORT("Unexpected pname to GetIntegerv");
}
}
GrGLvoid getProgramiv(GrGLuint program, GrGLenum pname, GrGLint* params) override {
this->getShaderOrProgramiv(program, pname, params);
}
GrGLvoid getProgramInfoLog(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length,
char* infolog) override {
this->getInfoLog(program, bufsize, length, infolog);
}
GrGLvoid getMultisamplefv(GrGLenum pname, GrGLuint index, GrGLfloat* val) override {
val[0] = val[1] = 0.5f;
}
GrGLvoid getQueryiv(GrGLenum GLtarget, GrGLenum pname, GrGLint *params) override {
switch (pname) {
case GR_GL_CURRENT_QUERY:
*params = 0;
break;
case GR_GL_QUERY_COUNTER_BITS:
*params = 32;
break;
default:
SK_ABORT("Unexpected pname passed GetQueryiv.");
}
}
GrGLvoid getQueryObjecti64v(GrGLuint id, GrGLenum pname, GrGLint64 *params) override {
this->queryResult(id, pname, params);
}
GrGLvoid getQueryObjectiv(GrGLuint id, GrGLenum pname, GrGLint *params) override {
this->queryResult(id, pname, params);
}
GrGLvoid getQueryObjectui64v(GrGLuint id, GrGLenum pname, GrGLuint64 *params) override {
this->queryResult(id, pname, params);
}
GrGLvoid getQueryObjectuiv(GrGLuint id, GrGLenum pname, GrGLuint *params) override {
this->queryResult(id, pname, params);
}
GrGLvoid getShaderiv(GrGLuint shader, GrGLenum pname, GrGLint* params) override {
this->getShaderOrProgramiv(shader, pname, params);
}
GrGLvoid getShaderInfoLog(GrGLuint shader, GrGLsizei bufsize, GrGLsizei* length,
char* infolog) override {
this->getInfoLog(shader, bufsize, length, infolog);
}
const GrGLubyte* getString(GrGLenum name) override {
switch (name) {
case GR_GL_EXTENSIONS:
return CombinedExtensionString();
case GR_GL_VERSION:
return (const GrGLubyte*)"4.0 Null GL";
case GR_GL_SHADING_LANGUAGE_VERSION:
return (const GrGLubyte*)"4.20.8 Null GLSL";
case GR_GL_VENDOR:
return (const GrGLubyte*)"Null Vendor";
case GR_GL_RENDERER:
return (const GrGLubyte*)"The Null (Non-)Renderer";
default:
SK_ABORT("Unexpected name passed to GetString");
return nullptr;
}
}
const GrGLubyte* getStringi(GrGLenum name, GrGLuint i) override {
switch (name) {
case GR_GL_EXTENSIONS: {
GrGLint count;
this->getIntegerv(GR_GL_NUM_EXTENSIONS, &count);
if ((GrGLint)i <= count) {
return (const GrGLubyte*) fAdvertisedExtensions[i];
} else {
return nullptr;
}
}
default:
SK_ABORT("Unexpected name passed to GetStringi");
return nullptr;
}
}
GrGLint getUniformLocation(GrGLuint program, const char* name) override {
return ++fCurrUniformLocation;
}
GrGLvoid* mapBufferRange(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length,
GrGLbitfield access) override {
GrGLuint id = fBoundBuffers[GetBufferIndex(target)];
if (id > 0) {
// We just ignore the offset and length here.
Buffer* buffer = fBufferManager.lookUp(id);
SkASSERT(!buffer->mapped());
buffer->setMapped(true);
return buffer->dataPtr();
}
return nullptr;
}
GrGLvoid* mapBuffer(GrGLenum target, GrGLenum access) override {
GrGLuint id = fBoundBuffers[GetBufferIndex(target)];
if (id > 0) {
Buffer* buffer = fBufferManager.lookUp(id);
SkASSERT(!buffer->mapped());
buffer->setMapped(true);
return buffer->dataPtr();
}
SkASSERT(false);
return nullptr; // no buffer bound to target
}
GrGLboolean unmapBuffer(GrGLenum target) override {
GrGLuint id = fBoundBuffers[GetBufferIndex(target)];
if (id > 0) {
Buffer* buffer = fBufferManager.lookUp(id);
SkASSERT(buffer->mapped());
buffer->setMapped(false);
return GR_GL_TRUE;
}
GrAlwaysAssert(false);
return GR_GL_FALSE; // GR_GL_INVALID_OPERATION;
}
GrGLvoid getBufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) override {
switch (pname) {
case GR_GL_BUFFER_MAPPED: {
*params = GR_GL_FALSE;
GrGLuint id = fBoundBuffers[GetBufferIndex(target)];
if (id > 0) {
Buffer* buffer = fBufferManager.lookUp(id);
if (buffer->mapped()) {
*params = GR_GL_TRUE;
}
}
break; }
default:
SK_ABORT("Unexpected pname to GetBufferParamateriv");
break;
}
}
// NV_path_rendering
GrGLuint genPaths(GrGLsizei range) override {
return ++fCurrPathID;
}
private:
inline int static GetBufferIndex(GrGLenum glTarget) {
switch (glTarget) {
default: SK_ABORT("Unexpected GL target to GetBufferIndex");
case GR_GL_ARRAY_BUFFER: return 0;
case GR_GL_ELEMENT_ARRAY_BUFFER: return 1;
case GR_GL_TEXTURE_BUFFER: return 2;
case GR_GL_DRAW_INDIRECT_BUFFER: return 3;
case GR_GL_PIXEL_PACK_BUFFER: return 4;
case GR_GL_PIXEL_UNPACK_BUFFER: return 5;
}
}
constexpr int static kNumBufferTargets = 6;
TGLObjectManager<Buffer> fBufferManager;
GrGLuint fBoundBuffers[kNumBufferTargets];
TGLObjectManager<Framebuffer> fFramebufferManager;
GrGLuint fCurrDrawFramebuffer;
GrGLuint fCurrReadFramebuffer;
TGLObjectManager<Renderbuffer> fRenderbufferManager;
GrGLuint fCurrRenderbuffer;
GrGLuint fCurrProgramID;
GrGLuint fCurrShaderID;
GrGLuint fCurrGenericID;
GrGLuint fCurrUniformLocation;
GrGLuint fCurrPathID;
sk_sp<const Texture> fSingleTextureObject;
SkTArray<const char*> fAdvertisedExtensions;
// the OpenGLES 2.0 spec says this must be >= 128
static const GrGLint kDefaultMaxVertexUniformVectors = 128;
// the OpenGLES 2.0 spec says this must be >=16
static const GrGLint kDefaultMaxFragmentUniformVectors = 16;
// the OpenGLES 2.0 spec says this must be >= 8
static const GrGLint kDefaultMaxVertexAttribs = 8;
// the OpenGLES 2.0 spec says this must be >= 8
static const GrGLint kDefaultMaxVaryingVectors = 8;
GrGLuint getBoundFramebufferID(GrGLenum target) {
switch (target) {
case GR_GL_FRAMEBUFFER:
case GR_GL_DRAW_FRAMEBUFFER:
return fCurrDrawFramebuffer;
case GR_GL_READ_FRAMEBUFFER:
return fCurrReadFramebuffer;
default:
SK_ABORT("Invalid framebuffer target.");
return 0;
}
}
const Texture* getSingleTextureObject() {
// We currently only use FramebufferAttachment objects for a sample count, and all textures
// in Skia have one sample, so there is no need as of yet to track individual textures. This
// also works around a bug in chromium's cc_unittests where they send us texture IDs that
// were generated by cc::TestGLES2Interface.
if (!fSingleTextureObject) {
fSingleTextureObject.reset(new Texture);
}
return fSingleTextureObject.get();
}
const GrGLubyte* CombinedExtensionString() {
static SkString gExtString;
static SkMutex gMutex;
gMutex.acquire();
if (0 == gExtString.size()) {
int i = 0;
while (fAdvertisedExtensions[i]) {
if (i > 0) {
gExtString.append(" ");
}
gExtString.append(fAdvertisedExtensions[i]);
++i;
}
}
gMutex.release();
return (const GrGLubyte*) gExtString.c_str();
}
GrGLvoid genGenericIds(GrGLsizei n, GrGLuint* ids) {
for (int i = 0; i < n; ++i) {
ids[i] = ++fCurrGenericID;
}
}
GrGLvoid getInfoLog(GrGLuint object, GrGLsizei bufsize, GrGLsizei* length,
char* infolog) {
if (length) {
*length = 0;
}
if (bufsize > 0) {
*infolog = 0;
}
}
GrGLvoid getShaderOrProgramiv(GrGLuint object, GrGLenum pname, GrGLint* params) {
switch (pname) {
case GR_GL_LINK_STATUS: // fallthru
case GR_GL_COMPILE_STATUS:
*params = GR_GL_TRUE;
break;
case GR_GL_INFO_LOG_LENGTH: // fallthru
case GL_PROGRAM_BINARY_LENGTH:
*params = 0;
break;
// we don't expect any other pnames
default:
SK_ABORT("Unexpected pname to GetProgramiv");
break;
}
}
template <typename T>
void queryResult(GrGLenum GLtarget, GrGLenum pname, T *params) {
switch (pname) {
case GR_GL_QUERY_RESULT_AVAILABLE:
*params = GR_GL_TRUE;
break;
case GR_GL_QUERY_RESULT:
*params = 0;
break;
default:
SK_ABORT("Unexpected pname passed to GetQueryObject.");
break;
}
}
typedef GrGLTestInterface INHERITED;
};
} // anonymous namespace
const GrGLInterface* GrGLCreateNullInterface(bool enableNVPR) { return new NullInterface(enableNVPR); }