diff options
Diffstat (limited to 'WebKit/chromium/src/GraphicsContext3D.cpp')
| -rw-r--r-- | WebKit/chromium/src/GraphicsContext3D.cpp | 191 |
1 files changed, 15 insertions, 176 deletions
diff --git a/WebKit/chromium/src/GraphicsContext3D.cpp b/WebKit/chromium/src/GraphicsContext3D.cpp index 83574da..807a794 100644 --- a/WebKit/chromium/src/GraphicsContext3D.cpp +++ b/WebKit/chromium/src/GraphicsContext3D.cpp @@ -65,17 +65,12 @@ #if PLATFORM(CG) #include "GraphicsContext.h" #include <CoreGraphics/CGContext.h> -#include <CoreGraphics/CGBitmapContext.h> #include <CoreGraphics/CGImage.h> #include <OpenGL/OpenGL.h> #else #define FLIP_FRAMEBUFFER_VERTICALLY #endif -#if PLATFORM(SKIA) -#include "NativeImageSkia.h" -#endif - #if OS(DARWIN) #define USE_TEXTURE_RECTANGLE_FOR_FRAMEBUFFER #endif @@ -1878,178 +1873,17 @@ int GraphicsContext3D::texImage2D(unsigned target, return 0; } -// Remove premultiplied alpha from color channels. -// FIXME: this is lossy. Must retrieve original values from HTMLImageElement. -static void unmultiplyAlpha(unsigned char* rgbaData, int numPixels) -{ - for (int j = 0; j < numPixels; j++) { - float b = rgbaData[4*j+0] / 255.0f; - float g = rgbaData[4*j+1] / 255.0f; - float r = rgbaData[4*j+2] / 255.0f; - float a = rgbaData[4*j+3] / 255.0f; - if (a > 0.0f) { - b /= a; - g /= a; - r /= a; - b = (b > 1.0f) ? 1.0f : b; - g = (g > 1.0f) ? 1.0f : g; - r = (r > 1.0f) ? 1.0f : r; - rgbaData[4*j+0] = (unsigned char) (b * 255.0f); - rgbaData[4*j+1] = (unsigned char) (g * 255.0f); - rgbaData[4*j+2] = (unsigned char) (r * 255.0f); - } - } -} - -// FIXME: this must be changed to refer to the original image data -// rather than unmultiplying the alpha channel. -static int texImage2DHelper(unsigned target, unsigned level, - int width, int height, - int rowBytes, - bool flipY, - bool premultiplyAlpha, - GLenum format, - bool skipAlpha, - unsigned char* pixels) -{ - ASSERT(format == GL_RGBA || format == GL_BGRA); - GLint internalFormat = GL_RGBA8; - if (skipAlpha) { - internalFormat = GL_RGB8; - // Ignore the alpha channel - premultiplyAlpha = true; - } - if (flipY) { - // Need to flip images vertically. To avoid making a copy of - // the entire image, we perform a ton of glTexSubImage2D - // calls. FIXME: should rethink this strategy for efficiency. - glTexImage2D(target, level, internalFormat, - width, - height, - 0, - format, - GL_UNSIGNED_BYTE, - 0); - unsigned char* row = 0; - bool allocatedRow = false; - if (!premultiplyAlpha) { - row = new unsigned char[rowBytes]; - allocatedRow = true; - } - for (int i = 0; i < height; i++) { - if (premultiplyAlpha) - row = pixels + (rowBytes * i); - else { - memcpy(row, pixels + (rowBytes * i), rowBytes); - unmultiplyAlpha(row, width); - } - glTexSubImage2D(target, level, 0, height - i - 1, - width, 1, - format, - GL_UNSIGNED_BYTE, - row); - } - if (allocatedRow) - delete[] row; - } else { - // The pixels of cube maps' faces are defined with a top-down - // scanline ordering, unlike GL_TEXTURE_2D, so when uploading - // these, the above vertical flip is the wrong thing to do. - if (premultiplyAlpha) - glTexImage2D(target, level, internalFormat, - width, - height, - 0, - format, - GL_UNSIGNED_BYTE, - pixels); - else { - glTexImage2D(target, level, internalFormat, - width, - height, - 0, - format, - GL_UNSIGNED_BYTE, - 0); - unsigned char* row = new unsigned char[rowBytes]; - for (int i = 0; i < height; i++) { - memcpy(row, pixels + (rowBytes * i), rowBytes); - unmultiplyAlpha(row, width); - glTexSubImage2D(target, level, 0, i, - width, 1, - format, - GL_UNSIGNED_BYTE, - row); - } - delete[] row; - } - } - return 0; -} - int GraphicsContext3D::texImage2D(unsigned target, unsigned level, Image* image, bool flipY, bool premultiplyAlpha) { - ASSERT(image); - - int res = -1; -#if PLATFORM(SKIA) - NativeImageSkia* skiaImage = image->nativeImageForCurrentFrame(); - if (!skiaImage) { - ASSERT_NOT_REACHED(); + Vector<uint8_t> imageData; + unsigned int format, internalFormat; + if (!extractImageData(image, flipY, premultiplyAlpha, imageData, &format, &internalFormat)) return -1; - } - SkBitmap::Config skiaConfig = skiaImage->config(); - // FIXME: must support more image configurations. - if (skiaConfig != SkBitmap::kARGB_8888_Config) { - ASSERT_NOT_REACHED(); - return -1; - } - SkBitmap& skiaImageRef = *skiaImage; - SkAutoLockPixels lock(skiaImageRef); - int width = skiaImage->width(); - int height = skiaImage->height(); - unsigned char* pixels = - reinterpret_cast<unsigned char*>(skiaImage->getPixels()); - int rowBytes = skiaImage->rowBytes(); - res = texImage2DHelper(target, level, - width, height, - rowBytes, - flipY, premultiplyAlpha, - GL_BGRA, - false, - pixels); -#elif PLATFORM(CG) - CGImageRef cgImage = image->nativeImageForCurrentFrame(); - if (!cgImage) { - ASSERT_NOT_REACHED(); - return -1; - } - int width = CGImageGetWidth(cgImage); - int height = CGImageGetHeight(cgImage); - int rowBytes = width * 4; - CGImageAlphaInfo info = CGImageGetAlphaInfo(cgImage); - bool skipAlpha = (info == kCGImageAlphaNone - || info == kCGImageAlphaNoneSkipLast - || info == kCGImageAlphaNoneSkipFirst); - unsigned char* imageData = new unsigned char[height * rowBytes]; - CGColorSpaceRef colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB); - CGContextRef tmpContext = CGBitmapContextCreate(imageData, width, height, 8, rowBytes, - colorSpace, - kCGImageAlphaPremultipliedLast); - CGColorSpaceRelease(colorSpace); - CGContextSetBlendMode(tmpContext, kCGBlendModeCopy); - CGContextDrawImage(tmpContext, - CGRectMake(0, 0, static_cast<CGFloat>(width), static_cast<CGFloat>(height)), - cgImage); - CGContextRelease(tmpContext); - res = texImage2DHelper(target, level, width, height, rowBytes, - flipY, premultiplyAlpha, GL_RGBA, skipAlpha, imageData); - delete[] imageData; -#else -#error Must port to your platform -#endif - return res; + glTexImage2D(target, level, internalFormat, + image->width(), image->height(), 0, + format, GL_UNSIGNED_BYTE, imageData.data()); + return 0; } GL_SAME_METHOD_3(TexParameterf, texParameterf, unsigned, unsigned, float); @@ -2078,9 +1912,14 @@ int GraphicsContext3D::texSubImage2D(unsigned target, bool flipY, bool premultiplyAlpha) { - // FIXME: implement. - notImplemented(); - return -1; + Vector<uint8_t> imageData; + unsigned int format, internalFormat; + if (!extractImageData(image, flipY, premultiplyAlpha, imageData, &format, &internalFormat)) + return -1; + glTexSubImage2D(target, level, xoffset, yoffset, + image->width(), image->height(), + format, GL_UNSIGNED_BYTE, imageData.data()); + return 0; } GL_SAME_METHOD_2(Uniform1f, uniform1f, long, float) |