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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() {
static const GrGLenum repeatModes[] = {
GR_GL_CLAMP_TO_EDGE,
GR_GL_REPEAT,
GR_GL_MIRRORED_REPEAT
};
return repeatModes;
};
void GrGLTexture::init(GrGpuGL* gpu,
const Desc& textureDesc,
const GrGLRenderTarget::Desc* rtDesc) {
GrAssert(0 != textureDesc.fTextureID);
fTexParams.invalidate();
fTexParamsTimestamp = GrGpu::kExpiredTimestamp;
fTexIDObj = new GrGLTexID(GPUGL->glInterface(),
textureDesc.fTextureID,
textureDesc.fOwnsID);
fUploadFormat = textureDesc.fUploadFormat;
fUploadType = textureDesc.fUploadType;
fOrientation = textureDesc.fOrientation;
if (NULL != rtDesc) {
// we render to the top left
GrGLIRect vp;
vp.fLeft = 0;
vp.fWidth = textureDesc.fWidth;
vp.fBottom = 0;
vp.fHeight = textureDesc.fHeight;
fRenderTarget = new GrGLRenderTarget(gpu, *rtDesc, vp, fTexIDObj, this);
}
}
GrGLTexture::GrGLTexture(GrGpuGL* gpu,
const Desc& textureDesc)
: INHERITED(gpu,
textureDesc.fWidth,
textureDesc.fHeight,
textureDesc.fConfig) {
this->init(gpu, textureDesc, NULL);
}
GrGLTexture::GrGLTexture(GrGpuGL* gpu,
const Desc& textureDesc,
const GrGLRenderTarget::Desc& rtDesc)
: INHERITED(gpu,
textureDesc.fWidth,
textureDesc.fHeight,
textureDesc.fConfig) {
this->init(gpu, textureDesc, &rtDesc);
}
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) {
GrIRect bounds = GrIRect::MakeWH(this->width(), this->height());
GrIRect subrect = GrIRect::MakeXYWH(x,y,width, height);
if (!bounds.contains(subrect)) {
return;
}
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;
size_t bpp = GrBytesPerPixel(this->config());
size_t trimRowBytes = width * bpp;
if (!rowBytes) {
rowBytes = trimRowBytes;
}
/*
* 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 may not let us specify
* GL_UNPACK_ROW_LENGTH.
*/
bool restoreGLRowLength = false;
bool flipY = kBottomUp_Orientation == fOrientation;
if (GPUGL->glCaps().fUnpackRowLengthSupport && !flipY) {
// can't use this for flipping, only non-neg values allowed. :(
if (srcData && rowBytes != trimRowBytes) {
GrGLint rowLength = static_cast<GrGLint>(rowBytes / bpp);
GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, rowLength));
restoreGLRowLength = true;
}
} else {
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, static_cast<GrGLint>(bpp)));
GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D, 0, x, y, width, height,
fUploadFormat, fUploadType, srcData));
if (restoreGLRowLength) {
GrAssert(GPUGL->glCaps().fUnpackRowLengthSupport);
GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
}
}
intptr_t GrGLTexture::getTextureHandle() const {
return fTexIDObj->id();
}
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