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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 "GrGLGpu.h"
#define GPUGL static_cast<GrGLGpu*>(this->getGpu())
#define GL_CALL(X) GR_GL_CALL(GPUGL->glInterface(), X);
void GrGLAttribArrayState::set(const GrGLGpu* gpu,
int index,
GrGLVertexBuffer* buffer,
GrGLint size,
GrGLenum type,
GrGLboolean normalized,
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->fAttribPointerIsValid ||
array->fVertexBufferID != buffer->bufferID() ||
array->fSize != size ||
array->fNormalized != normalized ||
array->fStride != stride ||
array->fOffset != offset) {
buffer->bind();
GR_GL_CALL(gpu->glInterface(), VertexAttribPointer(index,
size,
type,
normalized,
stride,
offset));
array->fAttribPointerIsValid = true;
array->fVertexBufferID = buffer->bufferID();
array->fSize = size;
array->fNormalized = normalized;
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(GrGLGpu* gpu, GrGLint id, int attribCount)
: INHERITED(gpu, false)
, fID(id)
, fAttribArrays(attribCount)
, fIndexBufferIDIsValid(false) {
this->registerWithCache();
}
void GrGLVertexArray::onAbandon() {
fID = 0;
INHERITED::onAbandon();
}
void GrGLVertexArray::onRelease() {
if (0 != fID) {
GL_CALL(DeleteVertexArrays(1, &fID));
GPUGL->notifyVertexArrayDelete(fID);
fID = 0;
}
INHERITED::onRelease();
}
GrGLAttribArrayState* GrGLVertexArray::bind() {
if (0 == fID) {
return NULL;
}
GPUGL->bindVertexArray(fID);
return &fAttribArrays;
}
GrGLAttribArrayState* GrGLVertexArray::bindWithIndexBuffer(const GrGLIndexBuffer* buffer) {
GrGLAttribArrayState* state = this->bind();
if (state && buffer) {
GrGLuint bufferID = buffer->bufferID();
if (!fIndexBufferIDIsValid || bufferID != fIndexBufferID) {
GL_CALL(BindBuffer(GR_GL_ELEMENT_ARRAY_BUFFER, bufferID));
fIndexBufferIDIsValid = true;
fIndexBufferID = bufferID;
}
}
return state;
}
void GrGLVertexArray::notifyIndexBufferDelete(GrGLuint bufferID) {
if (fIndexBufferIDIsValid && bufferID == fIndexBufferID) {
fIndexBufferID = 0;
}
}
void GrGLVertexArray::invalidateCachedState() {
fAttribArrays.invalidate();
fIndexBufferIDIsValid = false;
}
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