Reland of Upgrade PixelStorei to ES3/WebGL2.

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 4161 matching lines @@
     bool needConversion = true;
     if (type == GL_UNSIGNED_BYTE && sourceDataFormat == WebGLImageConversion::DataFormatRGBA8 && format == GL_RGBA && alphaOp == WebGLImageConversion::AlphaDoNothing && !flipY) {
         needConversion = false;
     } else {
         if (!WebGLImageConversion::packImageData(image, imagePixelData, format, type, flipY, alphaOp, sourceDataFormat, imageExtractor.imageWidth(), imageExtractor.imageHeight(), imageExtractor.imageSourceUnpackAlignment(), data)) {
             synthesizeGLError(GL_INVALID_VALUE, "texImage2D", "packImage error");
             return;
         }
     }
 
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    resetUnpackParameters();
     texImage2DBase(target, level, internalformat, imageExtractor.imageWidth(), imageExtractor.imageHeight(), 0, format, type, needConversion ? data.data() : imagePixelData);
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
+    restoreUnpackParameters();
 }
 
 bool WebGLRenderingContextBase::validateTexFunc(const char* functionName, TexImageFunctionType functionType, TexFuncValidationSourceType sourceType, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, GLint xoffset, GLint yoffset)
 {
     if (!validateTexFuncLevel(functionName, target, level))
         return false;
     WebGLTexture* texture = validateTextureBinding(functionName, target, true);
     if (!texture)
         return false;
 
@@ skipping 98 matching lines @@
     void* data = pixels ? pixels->baseAddress() : 0;
     Vector<uint8_t> tempData;
     bool changeUnpackAlignment = false;
     if (data && (m_unpackFlipY || m_unpackPremultiplyAlpha)) {
         if (!WebGLImageConversion::extractTextureData(width, height, format, type, m_unpackAlignment, m_unpackFlipY, m_unpackPremultiplyAlpha, data, tempData))
             return;
         data = tempData.data();
         changeUnpackAlignment = true;
     }
     if (changeUnpackAlignment)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
+        resetUnpackParameters();
     texImage2DBase(target, level, internalformat, width, height, border, format, type, data);
     if (changeUnpackAlignment)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
+        restoreUnpackParameters();
 }
 
 void WebGLRenderingContextBase::texImage2D(GLenum target, GLint level, GLenum internalformat,
     GLenum format, GLenum type, ImageData* pixels)
 {
     if (!pixels) {
         synthesizeGLError(GL_INVALID_VALUE, "texImage2D", "no image data");
         return;
     }
     if (isContextLost() || !validateTexFunc("texImage2D", NotTexSubImage2D, SourceImageData, target, level, internalformat, pixels->width(), pixels->height(), 0, format, type, 0, 0))
         return;
     if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
         // The UNSIGNED_INT_10F_11F_11F_REV type pack/unpack isn't implemented.
         type = GL_FLOAT;
     }
     Vector<uint8_t> data;
     bool needConversion = true;
     // The data from ImageData is always of format RGBA8.
     // No conversion is needed if destination format is RGBA and type is USIGNED_BYTE and no Flip or Premultiply operation is required.
     if (!m_unpackFlipY && !m_unpackPremultiplyAlpha && format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
         needConversion = false;
     } else {
         if (!WebGLImageConversion::extractImageData(pixels->data()->data(), pixels->size(), format, type, m_unpackFlipY, m_unpackPremultiplyAlpha, data)) {
             synthesizeGLError(GL_INVALID_VALUE, "texImage2D", "bad image data");
             return;
         }
     }
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    resetUnpackParameters();
     texImage2DBase(target, level, internalformat, pixels->width(), pixels->height(), 0, format, type, needConversion ? data.data() : pixels->data()->data());
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
+    restoreUnpackParameters();
 }
 
 void WebGLRenderingContextBase::texImage2D(GLenum target, GLint level, GLenum internalformat,
     GLenum format, GLenum type, HTMLImageElement* image, ExceptionState& exceptionState)
 {
     if (isContextLost() || !validateHTMLImageElement("texImage2D", image, exceptionState))
         return;
     if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
         // The UNSIGNED_INT_10F_11F_11F_REV type pack/unpack isn't implemented.
         type = GL_FLOAT;
@@ skipping 244 matching lines @@
     bool needConversion = true;
     if (type == GL_UNSIGNED_BYTE && sourceDataFormat == WebGLImageConversion::DataFormatRGBA8 && format == GL_RGBA && alphaOp == WebGLImageConversion::AlphaDoNothing && !flipY) {
         needConversion = false;
     } else {
         if (!WebGLImageConversion::packImageData(image, imagePixelData, format, type, flipY, alphaOp, sourceDataFormat, imageExtractor.imageWidth(), imageExtractor.imageHeight(), imageExtractor.imageSourceUnpackAlignment(), data)) {
             synthesizeGLError(GL_INVALID_VALUE, "texSubImage2D", "bad image data");
             return;
         }
     }
 
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    resetUnpackParameters();
     webContext()->texSubImage2D(target, level, xoffset, yoffset, imageExtractor.imageWidth(), imageExtractor.imageHeight(), format, type,  needConversion ? data.data() : imagePixelData);
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
+    restoreUnpackParameters();
 }
 
 void WebGLRenderingContextBase::texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
     GLsizei width, GLsizei height,
     GLenum format, GLenum type, DOMArrayBufferView* pixels)
 {
     if (isContextLost() || !validateTexFunc("texSubImage2D", TexSubImage2D, SourceArrayBufferView, target, level, 0, width, height, 0, format, type, xoffset, yoffset)
         || !validateTexFuncData("texSubImage2D", level, width, height, 1, format, type, pixels, NullNotAllowed))
         return;
     void* data = pixels->baseAddress();
     Vector<uint8_t> tempData;
     bool changeUnpackAlignment = false;
     if (data && (m_unpackFlipY || m_unpackPremultiplyAlpha)) {
         if (!WebGLImageConversion::extractTextureData(width, height, format, type,
             m_unpackAlignment, m_unpackFlipY, m_unpackPremultiplyAlpha, data, tempData))
             return;
         data = tempData.data();
         changeUnpackAlignment = true;
     }
     if (changeUnpackAlignment)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
+        resetUnpackParameters();
     webContext()->texSubImage2D(target, level, xoffset, yoffset, width, height, format, type, data);
     if (changeUnpackAlignment)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
+        restoreUnpackParameters();
 }
 
 void WebGLRenderingContextBase::texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
     GLenum format, GLenum type, ImageData* pixels)
 {
     if (!pixels) {
         synthesizeGLError(GL_INVALID_VALUE, "texSubImage2D", "no image data");
         return;
     }
     if (isContextLost() || !validateTexFunc("texSubImage2D", TexSubImage2D, SourceImageData, target, level, 0,  pixels->width(), pixels->height(), 0, format, type, xoffset, yoffset))
         return;
     if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
         // The UNSIGNED_INT_10F_11F_11F_REV type pack/unpack isn't implemented.
         type = GL_FLOAT;
     }
     Vector<uint8_t> data;
     bool needConversion = true;
     // The data from ImageData is always of format RGBA8.
     // No conversion is needed if destination format is RGBA and type is USIGNED_BYTE and no Flip or Premultiply operation is required.
     if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && !m_unpackFlipY && !m_unpackPremultiplyAlpha) {
         needConversion = false;
     } else {
         if (!WebGLImageConversion::extractImageData(pixels->data()->data(), pixels->size(), format, type, m_unpackFlipY, m_unpackPremultiplyAlpha, data)) {
             synthesizeGLError(GL_INVALID_VALUE, "texSubImage2D", "bad image data");
             return;
         }
     }
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    resetUnpackParameters();
     webContext()->texSubImage2D(target, level, xoffset, yoffset, pixels->width(), pixels->height(), format, type, needConversion ? data.data() : pixels->data()->data());
-    if (m_unpackAlignment != 1)
-        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
+    restoreUnpackParameters();
 }
 
 void WebGLRenderingContextBase::texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
     GLenum format, GLenum type, HTMLImageElement* image, ExceptionState& exceptionState)
 {
     if (isContextLost() || !validateHTMLImageElement("texSubImage2D", image, exceptionState))
         return;
 
     if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
         // The UNSIGNED_INT_10F_11F_11F_REV type pack/unpack isn't implemented.
@@ skipping 2251 matching lines @@
     }
 
     return totalBytesPerPixel;
 }
 
 DrawingBuffer* WebGLRenderingContextBase::drawingBuffer() const
 {
     return m_drawingBuffer.get();
 }
 
+void WebGLRenderingContextBase::resetUnpackParameters()
+{
+    if (m_unpackAlignment != 1)
+        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, 1);
+}
+
+void WebGLRenderingContextBase::restoreUnpackParameters()
+{
+    if (m_unpackAlignment != 1)
+        webContext()->pixelStorei(GL_UNPACK_ALIGNMENT, m_unpackAlignment);
+}
+
 } // namespace blink