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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGLVertexArray.h"
#include "GrGLBuffer.h"
#include "GrGLGpu.h"
struct AttribLayout {
GrGLint fCount;
GrGLenum fType;
GrGLboolean fNormalized; // Only used by floating point types.
};
static const AttribLayout gLayouts[kGrVertexAttribTypeCount] = {
{1, GR_GL_FLOAT, false}, // kFloat_GrVertexAttribType
{2, GR_GL_FLOAT, false}, // kVec2f_GrVertexAttribType
{3, GR_GL_FLOAT, false}, // kVec3f_GrVertexAttribType
{4, GR_GL_FLOAT, false}, // kVec4f_GrVertexAttribType
{1, GR_GL_UNSIGNED_BYTE, true}, // kUByte_GrVertexAttribType
{4, GR_GL_UNSIGNED_BYTE, true}, // kVec4ub_GrVertexAttribType
{2, GR_GL_UNSIGNED_SHORT, true}, // kVec2s_GrVertexAttribType
{1, GR_GL_INT, false}, // kInt_GrVertexAttribType
{1, GR_GL_UNSIGNED_INT, false}, // kUint_GrVertexAttribType
};
GR_STATIC_ASSERT(0 == kFloat_GrVertexAttribType);
GR_STATIC_ASSERT(1 == kVec2f_GrVertexAttribType);
GR_STATIC_ASSERT(2 == kVec3f_GrVertexAttribType);
GR_STATIC_ASSERT(3 == kVec4f_GrVertexAttribType);
GR_STATIC_ASSERT(4 == kUByte_GrVertexAttribType);
GR_STATIC_ASSERT(5 == kVec4ub_GrVertexAttribType);
GR_STATIC_ASSERT(6 == kVec2us_GrVertexAttribType);
GR_STATIC_ASSERT(7 == kInt_GrVertexAttribType);
GR_STATIC_ASSERT(8 == kUint_GrVertexAttribType);
void GrGLAttribArrayState::set(GrGLGpu* gpu,
int index,
const GrGLBuffer* vertexBuffer,
GrVertexAttribType type,
GrGLsizei stride,
GrGLvoid* offset) {
SkASSERT(index >= 0 && index < fAttribArrayStates.count());
AttribArrayState* array = &fAttribArrayStates[index];
if (!array->fEnableIsValid || !array->fEnabled) {
GR_GL_CALL(gpu->glInterface(), EnableVertexAttribArray(index));
array->fEnableIsValid = true;
array->fEnabled = true;
}
if (array->fVertexBufferUniqueID != vertexBuffer->getUniqueID() ||
array->fType != type ||
array->fStride != stride ||
array->fOffset != offset) {
gpu->bindBuffer(kVertex_GrBufferType, vertexBuffer);
const AttribLayout& layout = gLayouts[type];
if (!GrVertexAttribTypeIsIntType(type)) {
GR_GL_CALL(gpu->glInterface(), VertexAttribPointer(index,
layout.fCount,
layout.fType,
layout.fNormalized,
stride,
offset));
} else {
SkASSERT(gpu->caps()->shaderCaps()->integerSupport());
SkASSERT(!layout.fNormalized);
GR_GL_CALL(gpu->glInterface(), VertexAttribIPointer(index,
layout.fCount,
layout.fType,
stride,
offset));
}
array->fVertexBufferUniqueID = vertexBuffer->getUniqueID();
array->fType = type;
array->fStride = stride;
array->fOffset = offset;
}
}
void GrGLAttribArrayState::disableUnusedArrays(const GrGLGpu* gpu, uint64_t usedMask) {
int count = fAttribArrayStates.count();
for (int i = 0; i < count; ++i) {
if (!(usedMask & 0x1)) {
if (!fAttribArrayStates[i].fEnableIsValid || fAttribArrayStates[i].fEnabled) {
GR_GL_CALL(gpu->glInterface(), DisableVertexAttribArray(i));
fAttribArrayStates[i].fEnableIsValid = true;
fAttribArrayStates[i].fEnabled = false;
}
} else {
SkASSERT(fAttribArrayStates[i].fEnableIsValid && fAttribArrayStates[i].fEnabled);
}
// if the count is greater than 64 then this will become 0 and we will disable arrays 64+.
usedMask >>= 1;
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
GrGLVertexArray::GrGLVertexArray(GrGLint id, int attribCount)
: fID(id)
, fAttribArrays(attribCount)
, fIndexBufferUniqueID(SK_InvalidUniqueID) {
}
GrGLAttribArrayState* GrGLVertexArray::bind(GrGLGpu* gpu) {
if (0 == fID) {
return nullptr;
}
gpu->bindVertexArray(fID);
return &fAttribArrays;
}
GrGLAttribArrayState* GrGLVertexArray::bindWithIndexBuffer(GrGLGpu* gpu, const GrGLBuffer* ibuff) {
GrGLAttribArrayState* state = this->bind(gpu);
if (state && fIndexBufferUniqueID != ibuff->getUniqueID()) {
GR_GL_CALL(gpu->glInterface(), BindBuffer(GR_GL_ELEMENT_ARRAY_BUFFER, ibuff->bufferID()));
fIndexBufferUniqueID = ibuff->getUniqueID();
}
return state;
}
void GrGLVertexArray::invalidateCachedState() {
fAttribArrays.invalidate();
fIndexBufferUniqueID = SK_InvalidUniqueID;
}
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