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https://github.com/mozilla/gecko-dev.git
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587 lines
22 KiB
C++
587 lines
22 KiB
C++
/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "GLUploadHelpers.h"
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#include "GLContext.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Tools.h" // For BytesPerPixel
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#include "nsRegion.h"
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namespace mozilla {
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using namespace gfx;
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namespace gl {
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/* These two techniques are suggested by "Bit Twiddling Hacks"
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*/
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/**
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* Returns true if |aNumber| is a power of two
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* 0 is incorreclty considered a power of two
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*/
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static bool
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IsPowerOfTwo(int aNumber)
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{
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return (aNumber & (aNumber - 1)) == 0;
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}
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/**
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* Returns the first integer greater than |aNumber| which is a power of two
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* Undefined for |aNumber| < 0
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*/
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static int
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NextPowerOfTwo(int aNumber)
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{
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#if defined(__arm__)
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return 1 << (32 - __builtin_clz(aNumber - 1));
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#else
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--aNumber;
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aNumber |= aNumber >> 1;
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aNumber |= aNumber >> 2;
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aNumber |= aNumber >> 4;
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aNumber |= aNumber >> 8;
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aNumber |= aNumber >> 16;
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return ++aNumber;
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#endif
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}
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static unsigned int
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DataOffset(const nsIntPoint &aPoint, int32_t aStride, SurfaceFormat aFormat)
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{
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unsigned int data = aPoint.y * aStride;
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data += aPoint.x * BytesPerPixel(aFormat);
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return data;
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}
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static GLint GetAddressAlignment(ptrdiff_t aAddress)
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{
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if (!(aAddress & 0x7)) {
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return 8;
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} else if (!(aAddress & 0x3)) {
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return 4;
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} else if (!(aAddress & 0x1)) {
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return 2;
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} else {
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return 1;
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}
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}
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// Take texture data in a given buffer and copy it into a larger buffer,
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// padding out the edge pixels for filtering if necessary
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static void
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CopyAndPadTextureData(const GLvoid* srcBuffer,
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GLvoid* dstBuffer,
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GLsizei srcWidth, GLsizei srcHeight,
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GLsizei dstWidth, GLsizei dstHeight,
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GLsizei stride, GLint pixelsize)
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{
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unsigned char *rowDest = static_cast<unsigned char*>(dstBuffer);
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const unsigned char *source = static_cast<const unsigned char*>(srcBuffer);
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for (GLsizei h = 0; h < srcHeight; ++h) {
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memcpy(rowDest, source, srcWidth * pixelsize);
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rowDest += dstWidth * pixelsize;
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source += stride;
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}
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GLsizei padHeight = srcHeight;
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// Pad out an extra row of pixels so that edge filtering doesn't use garbage data
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if (dstHeight > srcHeight) {
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memcpy(rowDest, source - stride, srcWidth * pixelsize);
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padHeight++;
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}
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// Pad out an extra column of pixels
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if (dstWidth > srcWidth) {
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rowDest = static_cast<unsigned char*>(dstBuffer) + srcWidth * pixelsize;
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for (GLsizei h = 0; h < padHeight; ++h) {
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memcpy(rowDest, rowDest - pixelsize, pixelsize);
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rowDest += dstWidth * pixelsize;
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}
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}
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}
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// In both of these cases (for the Adreno at least) it is impossible
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// to determine good or bad driver versions for POT texture uploads,
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// so blacklist them all. Newer drivers use a different rendering
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// string in the form "Adreno (TM) 200" and the drivers we've seen so
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// far work fine with NPOT textures, so don't blacklist those until we
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// have evidence of any problems with them.
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bool
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CanUploadSubTextures(GLContext* gl)
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{
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if (!gl->WorkAroundDriverBugs())
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return true;
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// There are certain GPUs that we don't want to use glTexSubImage2D on
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// because that function can be very slow and/or buggy
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if (gl->Renderer() == GLRenderer::Adreno200 ||
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gl->Renderer() == GLRenderer::Adreno205)
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{
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return false;
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}
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// On PowerVR glTexSubImage does a readback, so it will be slower
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// than just doing a glTexImage2D() directly. i.e. 26ms vs 10ms
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if (gl->Renderer() == GLRenderer::SGX540 ||
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gl->Renderer() == GLRenderer::SGX530)
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{
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return false;
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}
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return true;
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}
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static void
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TexSubImage2DWithUnpackSubimageGLES(GLContext* gl,
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GLenum target, GLint level,
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GLint xoffset, GLint yoffset,
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GLsizei width, GLsizei height,
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GLsizei stride, GLint pixelsize,
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GLenum format, GLenum type,
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const GLvoid* pixels)
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{
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
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std::min(GetAddressAlignment((ptrdiff_t)pixels),
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GetAddressAlignment((ptrdiff_t)stride)));
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// When using GL_UNPACK_ROW_LENGTH, we need to work around a Tegra
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// driver crash where the driver apparently tries to read
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// (stride - width * pixelsize) bytes past the end of the last input
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// row. We only upload the first height-1 rows using GL_UNPACK_ROW_LENGTH,
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// and then we upload the final row separately. See bug 697990.
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int rowLength = stride/pixelsize;
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gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, rowLength);
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gl->fTexSubImage2D(target,
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level,
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xoffset,
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yoffset,
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width,
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height-1,
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format,
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type,
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pixels);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, 0);
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gl->fTexSubImage2D(target,
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level,
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xoffset,
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yoffset+height-1,
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width,
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1,
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format,
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type,
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(const unsigned char *)pixels+(height-1)*stride);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
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}
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static void
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TexSubImage2DWithoutUnpackSubimage(GLContext* gl,
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GLenum target, GLint level,
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GLint xoffset, GLint yoffset,
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GLsizei width, GLsizei height,
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GLsizei stride, GLint pixelsize,
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GLenum format, GLenum type,
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const GLvoid* pixels)
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{
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// Not using the whole row of texture data and GL_UNPACK_ROW_LENGTH
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// isn't supported. We make a copy of the texture data we're using,
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// such that we're using the whole row of data in the copy. This turns
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// out to be more efficient than uploading row-by-row; see bug 698197.
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unsigned char *newPixels = new unsigned char[width*height*pixelsize];
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unsigned char *rowDest = newPixels;
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const unsigned char *rowSource = (const unsigned char *)pixels;
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for (int h = 0; h < height; h++) {
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memcpy(rowDest, rowSource, width*pixelsize);
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rowDest += width*pixelsize;
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rowSource += stride;
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}
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stride = width*pixelsize;
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
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std::min(GetAddressAlignment((ptrdiff_t)newPixels),
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GetAddressAlignment((ptrdiff_t)stride)));
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gl->fTexSubImage2D(target,
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level,
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xoffset,
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yoffset,
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width,
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height,
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format,
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type,
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newPixels);
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delete [] newPixels;
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
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}
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static void
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TexSubImage2DHelper(GLContext *gl,
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GLenum target, GLint level,
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GLint xoffset, GLint yoffset,
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GLsizei width, GLsizei height, GLsizei stride,
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GLint pixelsize, GLenum format,
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GLenum type, const GLvoid* pixels)
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{
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if (gl->IsGLES()) {
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if (stride == width * pixelsize) {
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
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std::min(GetAddressAlignment((ptrdiff_t)pixels),
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GetAddressAlignment((ptrdiff_t)stride)));
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gl->fTexSubImage2D(target,
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level,
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xoffset,
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yoffset,
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width,
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height,
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format,
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type,
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pixels);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
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} else if (gl->IsExtensionSupported(GLContext::EXT_unpack_subimage)) {
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TexSubImage2DWithUnpackSubimageGLES(gl, target, level, xoffset, yoffset,
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width, height, stride,
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pixelsize, format, type, pixels);
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} else {
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TexSubImage2DWithoutUnpackSubimage(gl, target, level, xoffset, yoffset,
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width, height, stride,
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pixelsize, format, type, pixels);
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}
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} else {
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// desktop GL (non-ES) path
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
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std::min(GetAddressAlignment((ptrdiff_t)pixels),
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GetAddressAlignment((ptrdiff_t)stride)));
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int rowLength = stride/pixelsize;
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gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, rowLength);
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gl->fTexSubImage2D(target,
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level,
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xoffset,
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yoffset,
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width,
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height,
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format,
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type,
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pixels);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, 0);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
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}
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}
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static void
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TexImage2DHelper(GLContext *gl,
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GLenum target, GLint level, GLint internalformat,
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GLsizei width, GLsizei height, GLsizei stride,
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GLint pixelsize, GLint border, GLenum format,
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GLenum type, const GLvoid *pixels)
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{
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if (gl->IsGLES()) {
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NS_ASSERTION(format == (GLenum)internalformat,
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"format and internalformat not the same for glTexImage2D on GLES2");
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if (!CanUploadNonPowerOfTwo(gl)
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&& (stride != width * pixelsize
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|| !IsPowerOfTwo(width)
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|| !IsPowerOfTwo(height))) {
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// Pad out texture width and height to the next power of two
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// as we don't support/want non power of two texture uploads
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GLsizei paddedWidth = NextPowerOfTwo(width);
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GLsizei paddedHeight = NextPowerOfTwo(height);
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GLvoid* paddedPixels = new unsigned char[paddedWidth * paddedHeight * pixelsize];
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// Pad out texture data to be in a POT sized buffer for uploading to
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// a POT sized texture
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CopyAndPadTextureData(pixels, paddedPixels, width, height,
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paddedWidth, paddedHeight, stride, pixelsize);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
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std::min(GetAddressAlignment((ptrdiff_t)paddedPixels),
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GetAddressAlignment((ptrdiff_t)paddedWidth * pixelsize)));
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gl->fTexImage2D(target,
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border,
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internalformat,
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paddedWidth,
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paddedHeight,
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border,
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format,
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type,
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paddedPixels);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
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delete[] static_cast<unsigned char*>(paddedPixels);
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return;
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}
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if (stride == width * pixelsize) {
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
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std::min(GetAddressAlignment((ptrdiff_t)pixels),
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GetAddressAlignment((ptrdiff_t)stride)));
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gl->fTexImage2D(target,
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border,
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internalformat,
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width,
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height,
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border,
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format,
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type,
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pixels);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
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} else {
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// Use GLES-specific workarounds for GL_UNPACK_ROW_LENGTH; these are
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// implemented in TexSubImage2D.
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gl->fTexImage2D(target,
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border,
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internalformat,
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width,
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height,
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border,
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format,
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type,
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nullptr);
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TexSubImage2DHelper(gl,
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target,
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level,
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0,
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0,
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width,
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height,
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stride,
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pixelsize,
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format,
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type,
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pixels);
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}
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} else {
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// desktop GL (non-ES) path
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
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std::min(GetAddressAlignment((ptrdiff_t)pixels),
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GetAddressAlignment((ptrdiff_t)stride)));
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int rowLength = stride/pixelsize;
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gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, rowLength);
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gl->fTexImage2D(target,
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level,
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internalformat,
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width,
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height,
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border,
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format,
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type,
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pixels);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, 0);
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gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
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}
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}
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SurfaceFormat
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UploadImageDataToTexture(GLContext* gl,
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unsigned char* aData,
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int32_t aStride,
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SurfaceFormat aFormat,
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const nsIntRegion& aDstRegion,
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GLuint& aTexture,
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bool aOverwrite,
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bool aPixelBuffer,
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GLenum aTextureUnit,
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GLenum aTextureTarget)
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{
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bool textureInited = aOverwrite ? false : true;
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gl->MakeCurrent();
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gl->fActiveTexture(aTextureUnit);
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if (!aTexture) {
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gl->fGenTextures(1, &aTexture);
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gl->fBindTexture(aTextureTarget, aTexture);
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gl->fTexParameteri(aTextureTarget,
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LOCAL_GL_TEXTURE_MIN_FILTER,
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LOCAL_GL_LINEAR);
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gl->fTexParameteri(aTextureTarget,
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LOCAL_GL_TEXTURE_MAG_FILTER,
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LOCAL_GL_LINEAR);
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gl->fTexParameteri(aTextureTarget,
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LOCAL_GL_TEXTURE_WRAP_S,
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LOCAL_GL_CLAMP_TO_EDGE);
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gl->fTexParameteri(aTextureTarget,
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LOCAL_GL_TEXTURE_WRAP_T,
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LOCAL_GL_CLAMP_TO_EDGE);
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textureInited = false;
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} else {
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gl->fBindTexture(aTextureTarget, aTexture);
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}
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nsIntRegion paintRegion;
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if (!textureInited) {
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paintRegion = nsIntRegion(aDstRegion.GetBounds());
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} else {
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paintRegion = aDstRegion;
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}
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GLenum format = 0;
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GLenum internalFormat = 0;
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GLenum type = 0;
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int32_t pixelSize = BytesPerPixel(aFormat);
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SurfaceFormat surfaceFormat = gfx::SurfaceFormat::UNKNOWN;
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MOZ_ASSERT(gl->GetPreferredARGB32Format() == LOCAL_GL_BGRA ||
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gl->GetPreferredARGB32Format() == LOCAL_GL_RGBA);
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switch (aFormat) {
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case SurfaceFormat::B8G8R8A8:
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if (gl->GetPreferredARGB32Format() == LOCAL_GL_BGRA) {
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format = LOCAL_GL_BGRA;
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surfaceFormat = SurfaceFormat::R8G8B8A8;
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type = LOCAL_GL_UNSIGNED_INT_8_8_8_8_REV;
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} else {
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format = LOCAL_GL_RGBA;
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surfaceFormat = SurfaceFormat::B8G8R8A8;
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type = LOCAL_GL_UNSIGNED_BYTE;
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}
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internalFormat = LOCAL_GL_RGBA;
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break;
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case SurfaceFormat::B8G8R8X8:
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// Treat BGRX surfaces as BGRA except for the surface
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// format used.
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if (gl->GetPreferredARGB32Format() == LOCAL_GL_BGRA) {
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format = LOCAL_GL_BGRA;
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surfaceFormat = SurfaceFormat::R8G8B8X8;
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type = LOCAL_GL_UNSIGNED_INT_8_8_8_8_REV;
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} else {
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format = LOCAL_GL_RGBA;
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surfaceFormat = SurfaceFormat::B8G8R8X8;
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type = LOCAL_GL_UNSIGNED_BYTE;
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}
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internalFormat = LOCAL_GL_RGBA;
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break;
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case SurfaceFormat::R8G8B8A8:
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if (gl->GetPreferredARGB32Format() == LOCAL_GL_BGRA) {
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// Upload our RGBA as BGRA, but store that the uploaded format is
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// BGRA. (sample from R to get B)
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format = LOCAL_GL_BGRA;
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type = LOCAL_GL_UNSIGNED_INT_8_8_8_8_REV;
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surfaceFormat = SurfaceFormat::B8G8R8A8;
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} else {
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format = LOCAL_GL_RGBA;
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type = LOCAL_GL_UNSIGNED_BYTE;
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surfaceFormat = SurfaceFormat::R8G8B8A8;
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}
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internalFormat = LOCAL_GL_RGBA;
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break;
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case SurfaceFormat::R8G8B8X8:
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// Treat RGBX surfaces as RGBA except for the surface
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// format used.
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if (gl->GetPreferredARGB32Format() == LOCAL_GL_BGRA) {
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format = LOCAL_GL_BGRA;
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type = LOCAL_GL_UNSIGNED_INT_8_8_8_8_REV;
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surfaceFormat = SurfaceFormat::B8G8R8X8;
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} else {
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format = LOCAL_GL_RGBA;
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type = LOCAL_GL_UNSIGNED_BYTE;
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surfaceFormat = SurfaceFormat::R8G8B8X8;
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}
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internalFormat = LOCAL_GL_RGBA;
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break;
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case SurfaceFormat::R5G6B5:
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internalFormat = format = LOCAL_GL_RGB;
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type = LOCAL_GL_UNSIGNED_SHORT_5_6_5;
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surfaceFormat = SurfaceFormat::R5G6B5;
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break;
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case SurfaceFormat::A8:
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internalFormat = format = LOCAL_GL_LUMINANCE;
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type = LOCAL_GL_UNSIGNED_BYTE;
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// We don't have a specific luminance shader
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surfaceFormat = SurfaceFormat::A8;
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break;
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default:
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NS_ASSERTION(false, "Unhandled image surface format!");
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}
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nsIntRegionRectIterator iter(paintRegion);
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const nsIntRect *iterRect;
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// Top left point of the region's bounding rectangle.
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nsIntPoint topLeft = paintRegion.GetBounds().TopLeft();
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|
|
while ((iterRect = iter.Next())) {
|
|
// The inital data pointer is at the top left point of the region's
|
|
// bounding rectangle. We need to find the offset of this rect
|
|
// within the region and adjust the data pointer accordingly.
|
|
unsigned char *rectData =
|
|
aData + DataOffset(iterRect->TopLeft() - topLeft, aStride, aFormat);
|
|
|
|
NS_ASSERTION(textureInited || (iterRect->x == 0 && iterRect->y == 0),
|
|
"Must be uploading to the origin when we don't have an existing texture");
|
|
|
|
if (textureInited && CanUploadSubTextures(gl)) {
|
|
TexSubImage2DHelper(gl,
|
|
aTextureTarget,
|
|
0,
|
|
iterRect->x,
|
|
iterRect->y,
|
|
iterRect->width,
|
|
iterRect->height,
|
|
aStride,
|
|
pixelSize,
|
|
format,
|
|
type,
|
|
rectData);
|
|
} else {
|
|
TexImage2DHelper(gl,
|
|
aTextureTarget,
|
|
0,
|
|
internalFormat,
|
|
iterRect->width,
|
|
iterRect->height,
|
|
aStride,
|
|
pixelSize,
|
|
0,
|
|
format,
|
|
type,
|
|
rectData);
|
|
}
|
|
|
|
}
|
|
|
|
return surfaceFormat;
|
|
}
|
|
|
|
SurfaceFormat
|
|
UploadSurfaceToTexture(GLContext* gl,
|
|
DataSourceSurface *aSurface,
|
|
const nsIntRegion& aDstRegion,
|
|
GLuint& aTexture,
|
|
bool aOverwrite,
|
|
const nsIntPoint& aSrcPoint,
|
|
bool aPixelBuffer,
|
|
GLenum aTextureUnit,
|
|
GLenum aTextureTarget)
|
|
{
|
|
unsigned char* data = aPixelBuffer ? nullptr : aSurface->GetData();
|
|
int32_t stride = aSurface->Stride();
|
|
SurfaceFormat format = aSurface->GetFormat();
|
|
data += DataOffset(aSrcPoint, stride, format);
|
|
return UploadImageDataToTexture(gl, data, stride, format,
|
|
aDstRegion, aTexture, aOverwrite,
|
|
aPixelBuffer, aTextureUnit,
|
|
aTextureTarget);
|
|
}
|
|
|
|
bool
|
|
CanUploadNonPowerOfTwo(GLContext* gl)
|
|
{
|
|
if (!gl->WorkAroundDriverBugs())
|
|
return true;
|
|
|
|
// Some GPUs driver crash when uploading non power of two 565 textures.
|
|
return gl->Renderer() != GLRenderer::Adreno200 &&
|
|
gl->Renderer() != GLRenderer::Adreno205;
|
|
}
|
|
|
|
}
|
|
}
|