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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 "GrGLTexture.h"
#include "GrGpuGL.h"
#define GPUGL static_cast<GrGpuGL*>(getGpu())
#define GL_CALL(X) GR_GL_CALL(GPUGL->glInterface(), X)
const GrGLenum* GrGLTexture::WrapMode2GLWrap(GrGLBinding binding) {
static const GrGLenum mirrorRepeatModes[] = {
GR_GL_CLAMP_TO_EDGE,
GR_GL_REPEAT,
GR_GL_MIRRORED_REPEAT
};
static const GrGLenum repeatModes[] = {
GR_GL_CLAMP_TO_EDGE,
GR_GL_REPEAT,
GR_GL_REPEAT
};
if (kES1_GrGLBinding == binding) {
return repeatModes; // GL_MIRRORED_REPEAT not supported.
} else {
return mirrorRepeatModes;
}
};
void GrGLTexture::init(GrGpuGL* gpu,
const Desc& textureDesc,
const GrGLRenderTarget::Desc* rtDesc,
const TexParams& initialTexParams) {
GrAssert(0 != textureDesc.fTextureID);
fTexParams = initialTexParams;
fTexIDObj = new GrGLTexID(GPUGL->glInterface(),
textureDesc.fTextureID,
textureDesc.fOwnsID);
fUploadFormat = textureDesc.fUploadFormat;
fUploadByteCount = textureDesc.fUploadByteCount;
fUploadType = textureDesc.fUploadType;
fOrientation = textureDesc.fOrientation;
fScaleX = GrIntToScalar(textureDesc.fContentWidth) /
textureDesc.fAllocWidth;
fScaleY = GrIntToScalar(textureDesc.fContentHeight) /
textureDesc.fAllocHeight;
if (NULL != rtDesc) {
// we render to the top left
GrGLIRect vp;
vp.fLeft = 0;
vp.fWidth = textureDesc.fContentWidth;
vp.fHeight = textureDesc.fContentHeight;
vp.fBottom = textureDesc.fAllocHeight - textureDesc.fContentHeight;
fRenderTarget = new GrGLRenderTarget(gpu, *rtDesc, vp, fTexIDObj, this);
}
}
GrGLTexture::GrGLTexture(GrGpuGL* gpu,
const Desc& textureDesc,
const TexParams& initialTexParams)
: INHERITED(gpu,
textureDesc.fContentWidth,
textureDesc.fContentHeight,
textureDesc.fAllocWidth,
textureDesc.fAllocHeight,
textureDesc.fFormat) {
this->init(gpu, textureDesc, NULL, initialTexParams);
}
GrGLTexture::GrGLTexture(GrGpuGL* gpu,
const Desc& textureDesc,
const GrGLRenderTarget::Desc& rtDesc,
const TexParams& initialTexParams)
: INHERITED(gpu,
textureDesc.fContentWidth,
textureDesc.fContentHeight,
textureDesc.fAllocWidth,
textureDesc.fAllocHeight,
textureDesc.fFormat) {
this->init(gpu, textureDesc, &rtDesc, initialTexParams);
}
void GrGLTexture::onRelease() {
INHERITED::onRelease();
GPUGL->notifyTextureDelete(this);
if (NULL != fTexIDObj) {
fTexIDObj->unref();
fTexIDObj = NULL;
}
}
void GrGLTexture::onAbandon() {
INHERITED::onAbandon();
if (NULL != fTexIDObj) {
fTexIDObj->abandon();
}
}
void GrGLTexture::uploadTextureData(int x,
int y,
int width,
int height,
const void* srcData,
size_t rowBytes) {
GPUGL->setSpareTextureUnit();
// ES2 glCompressedTexSubImage2D doesn't support any formats
// (at least without extensions)
GrAssert(fUploadFormat != GR_GL_PALETTE8_RGBA8);
// in case we need a temporary, trimmed copy of the src pixels
SkAutoSMalloc<128 * 128> tempStorage;
if (!rowBytes) {
rowBytes = fUploadByteCount * width;
}
/*
* check whether to allocate a temporary buffer for flipping y or
* because our srcData has extra bytes past each row. If so, we need
* to trim those off here, since GL ES doesn't let us specify
* GL_UNPACK_ROW_LENGTH.
*/
bool restoreGLRowLength = false;
bool flipY = kBottomUp_Orientation == fOrientation;
if (kDesktop_GrGLBinding == GPUGL->glBinding() && !flipY) {
// can't use this for flipping, only non-neg values allowed. :(
if (srcData && rowBytes) {
GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH,
rowBytes / fUploadByteCount));
restoreGLRowLength = true;
}
} else {
size_t trimRowBytes = width * fUploadByteCount;
if (srcData && (trimRowBytes < rowBytes || flipY)) {
// copy the data into our new storage, skipping the trailing bytes
size_t trimSize = height * trimRowBytes;
const char* src = (const char*)srcData;
if (flipY) {
src += (height - 1) * rowBytes;
}
char* dst = (char*)tempStorage.reset(trimSize);
for (int y = 0; y < height; y++) {
memcpy(dst, src, trimRowBytes);
if (flipY) {
src -= rowBytes;
} else {
src += rowBytes;
}
dst += trimRowBytes;
}
// now point srcData to our copied version
srcData = tempStorage.get();
}
}
if (flipY) {
y = this->height() - (y + height);
}
GL_CALL(BindTexture(GR_GL_TEXTURE_2D, fTexIDObj->id()));
GL_CALL(PixelStorei(GR_GL_UNPACK_ALIGNMENT, fUploadByteCount));
GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D, 0, x, y, width, height,
fUploadFormat, fUploadType, srcData));
if (kDesktop_GrGLBinding == GPUGL->glBinding()) {
if (restoreGLRowLength) {
GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
}
}
}
intptr_t GrGLTexture::getTextureHandle() const {
return fTexIDObj->id();
}
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