Attachment 187435 Details for Bug 106508 – patch

[patch] patch

platformsurface.patch (text/plain), 8.47 KB, created by Kalyan on 2013-02-09 10:13:54 PST

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Creator: Kalyan

Created: 2013-02-09 10:13:54 PST

Size: 8.47 KB

patch

obsolete

>diff --git Source/WebCore/ChangeLog Source/WebCore/ChangeLog
>index a293088..13debb0 100644
>--- Source/WebCore/ChangeLog
>+++ Source/WebCore/ChangeLog
>@@ -1,3 +1,28 @@
>+2013-02-09  Kondapally Kalyan  <kalyan.kondapally@intel.com>
>+
>+        [EFL] [WebGL] Add support for bliting texture contents to FBO.
>+        https://bugs.webkit.org/show_bug.cgi?id=106508
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Covered by existing WebGL tests.
>+
>+        We currently rely on EXT_framebuffer_blit to blit texture contents to the surface.
>+        This extension is not exposed on GLES2.0. This patch address this by making use
>+        of TextureMapperGL to draw texture contents to the surface on both GL and GLES.
>+
>+        * platform/graphics/opengl/GLPlatformSurface.cpp:
>+        (ScopedStateSaver):
>+        (WebCore::ScopedStateSaver::ScopedStateSaver):
>+        (WebCore::ScopedStateSaver::~ScopedStateSaver):
>+        (WebCore):
>+        Used to save and restore current bound Array Buffer.
>+        (WebCore::GLPlatformSurface::GLPlatformSurface):
>+        (WebCore::GLPlatformSurface::updateContents):
>+        (WebCore::GLPlatformSurface::destroy):
>+        * platform/graphics/opengl/GLPlatformSurface.h:
>+        (GLPlatformSurface):
>+
> 2013-02-09  Kent Tamura  <tkent@chromium.org>
>
>diff --git Source/WebCore/platform/graphics/efl/GraphicsContext3DPrivate.cpp Source/WebCore/platform/graphics/efl/GraphicsContext3DPrivate.cpp
>index d109567..66d0117 100644
>--- Source/WebCore/platform/graphics/efl/GraphicsContext3DPrivate.cpp
>+++ Source/WebCore/platform/graphics/efl/GraphicsContext3DPrivate.cpp
>@@ -140,10 +140,11 @@ uint32_t GraphicsContext3DPrivate::copyToGraphicsSurface()
>         m_platformSurface->setGeometry(IntRect(0, 0, m_context->m_currentWidth, m_context->m_currentHeight));
>     }
> 
>+    int width = m_context->m_currentWidth;
>+    int height = m_context->m_currentHeight;
>+
>     if (m_context->m_attrs.antialias) {
>         bool enableScissorTest = false;
>-        int width = m_context->m_currentWidth;
>-        int height = m_context->m_currentHeight;
>         // We should copy the full buffer, and not respect the current scissor bounds.
>         // FIXME: It would be more efficient to track the state of the scissor test.
>         if (m_context->isEnabled(GraphicsContext3D::SCISSOR_TEST)) {
>@@ -161,7 +162,7 @@ uint32_t GraphicsContext3DPrivate::copyToGraphicsSurface()
>             m_context->enable(GraphicsContext3D::SCISSOR_TEST);
>     }
> 
>-    m_platformSurface->updateContents(m_context->m_texture, m_context->m_boundFBO, m_context->m_boundTexture0);
>+    m_platformSurface->updateContents(m_context->m_texture, IntSize(width, height), m_context->m_boundFBO, m_context->m_boundTexture0);
> 
>     return 0;
> }
>diff --git Source/WebCore/platform/graphics/opengl/GLPlatformSurface.cpp Source/WebCore/platform/graphics/opengl/GLPlatformSurface.cpp
>index 7f7a564..2c24af6 100644
>--- Source/WebCore/platform/graphics/opengl/GLPlatformSurface.cpp
>+++ Source/WebCore/platform/graphics/opengl/GLPlatformSurface.cpp
>@@ -28,7 +28,7 @@
> 
> #if USE(ACCELERATED_COMPOSITING)
> 
>-#if HAVE(GLX)
>+#if USE(GLX)
> #include "GLXSurface.h"
> #endif
> 
>@@ -68,12 +68,53 @@ PassOwnPtr<GLPlatformSurface> GLPlatformSurface::createTransportSurface()
>     return nullptr;
> }
> 
>+class ScopedStateSaver {
>+    WTF_MAKE_NONCOPYABLE(ScopedStateSaver);
>+
>+public:
>+    ScopedStateSaver()
>+    {
>+        ::glGetIntegerv(GL_ACTIVE_TEXTURE, &m_boundTexUnit);
>+        ::glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &m_attribEnabled);
>+        ::glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_SIZE, &m_attribSize);
>+        ::glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_STRIDE, &m_attribStride);
>+        ::glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_TYPE, &m_attribType);
>+        ::glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, &m_attribNormalized);
>+        ::glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, &m_attribBufferBinding);
>+        ::glGetVertexAttribPointerv(0, GL_VERTEX_ATTRIB_ARRAY_POINTER, &m_attribPointer);
>+        ::glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &m_currentArrayBufferBinding);
>+        ::glActiveTexture(GL_TEXTURE0);
>+    }
>+
>+    ~ScopedStateSaver()
>+    {
>+        if (m_attribEnabled)
>+            ::glEnableVertexAttribArray(0);
>+
>+        ::glBindBuffer(GL_ARRAY_BUFFER, m_attribBufferBinding);
>+        ::glVertexAttribPointer(0, m_attribSize, m_attribType, m_attribNormalized, m_attribStride, m_attribPointer);
>+        ::glBindBuffer(GL_ARRAY_BUFFER, m_currentArrayBufferBinding);
>+        ::glActiveTexture(m_boundTexUnit);
>+    }
>+
>+private:
>+    GLint m_boundTexUnit;
>+    GLint m_boundProgram;
>+    GLint m_currentArrayBufferBinding;
>+    GLint m_attribEnabled;
>+    GLint m_attribSize;
>+    GLint m_attribStride;
>+    GLint m_attribType;
>+    GLint m_attribNormalized;
>+    GLint m_attribBufferBinding;
>+    void* m_attribPointer;
>+};
>+
> GLPlatformSurface::GLPlatformSurface()
>-    : m_restoreNeeded(true)
>-    , m_fboId(0)
>-    , m_sharedDisplay(0)
>+    : m_sharedDisplay(0)
>     , m_drawable(0)
>     , m_bufferHandle(0)
>+    , m_restoreNeeded(true)
> {
> }
> 
>@@ -111,28 +152,28 @@ void GLPlatformSurface::swapBuffers()
>     notImplemented();
> }
> 
>-void GLPlatformSurface::updateContents(const uint32_t texture, const GLuint bindFboId, const uint32_t bindTexture)
>+void GLPlatformSurface::updateContents(const uint32_t texture, const IntSize& textureSize, const GLuint bindFboId, const uint32_t bindTexture)
> {
>-    if (!m_fboId)
>-        glGenFramebuffers(1, &m_fboId);
>+    if (!m_textureBlitter) {
>+        m_textureBlitter = TextureMapperGL::create();
>+        m_flags = TextureMapperGL::ShouldFlipTexture;
>+    }
> 
>     m_restoreNeeded = false;
> 
>-    int x = 0;
>-    int y = 0;
>-    int width = m_rect.width();
>-    int height = m_rect.height();
>-
>-    glBindFramebuffer(GL_READ_FRAMEBUFFER, m_fboId);
>-    glBindTexture(GL_TEXTURE_2D, texture);
>-    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
>-    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
>-    // Use NEAREST as no scale is performed during the blit.
>-    glBlitFramebuffer(x, y, width, height, x, y, width, height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
>+    // Save any current bound vertex array to restore after updating surface with texture content.
>+    // This is needed as TextureMapperGL doesn't track and restore current bound vertex array.
>+    ScopedStateSaver stateSaver;
>+    ::glBindFramebuffer(GL_FRAMEBUFFER, 0);
>+
>+    m_textureBlitter->beginPainting();
>+    m_textureBlitter->drawTexture(texture, m_flags, textureSize, m_rect, m_identityMatrix, 1.0, 0);
>+    m_textureBlitter->endPainting();
>+
>+    ::glFlush();
>     swapBuffers();
>-    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
>-    glBindTexture(GL_TEXTURE_2D, bindTexture);
>-    glBindFramebuffer(GL_FRAMEBUFFER, bindFboId);
>+    ::glBindTexture(GL_TEXTURE_2D, bindTexture);
>+    ::glBindFramebuffer(GL_FRAMEBUFFER, bindFboId);
> }
> 
> void GLPlatformSurface::setGeometry(const IntRect& newRect)
>@@ -143,11 +184,6 @@ void GLPlatformSurface::setGeometry(const IntRect& newRect)
> void GLPlatformSurface::destroy()
> {
>     m_rect = IntRect();
>-
>-    if (m_fboId)
>-        glDeleteFramebuffers(1, &m_fboId);
>-
>-    m_fboId = 0;
> }
> 
> }
>diff --git Source/WebCore/platform/graphics/opengl/GLPlatformSurface.h Source/WebCore/platform/graphics/opengl/GLPlatformSurface.h
>index e8db425..acc8847 100644
>--- Source/WebCore/platform/graphics/opengl/GLPlatformSurface.h
>+++ Source/WebCore/platform/graphics/opengl/GLPlatformSurface.h
>@@ -30,6 +30,7 @@
> 
> #include "GLDefs.h"
> #include "IntRect.h"
>+#include <texmap/TextureMapperGL.h>
> #include <wtf/Noncopyable.h>
> #include <wtf/PassOwnPtr.h>
> 
>@@ -66,7 +67,7 @@ public:
>     // a) Blits texture contents to back buffer.
>     // b) Calls Swap Buffers.
>     // c) Sets current FBO as bindFboId.
>-    virtual void updateContents(const uint32_t texture, const GLuint bindFboId, const uint32_t bindTexture);
>+    virtual void updateContents(const uint32_t texture, const IntSize&, const GLuint bindFboId, const uint32_t bindTexture);
> 
>     virtual void setGeometry(const IntRect& newRect);
> 
>@@ -76,12 +77,14 @@ public:
> 
> protected:
>     GLPlatformSurface();
>-    bool m_restoreNeeded;
>-    IntRect m_rect;
>-    GLuint m_fboId;
>     PlatformDisplay m_sharedDisplay;
>     PlatformDrawable m_drawable;
>     PlatformBufferHandle m_bufferHandle;
>+    OwnPtr<TextureMapperGL> m_textureBlitter;
>+    bool m_restoreNeeded :1;
>+    IntRect m_rect;
>+    TransformationMatrix m_identityMatrix;
>+    TextureMapperGL::Flags m_flags;
> };
> 
> }

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Attachments on bug 106508: 182022 | 182603 | 185304 | 187316 | 187435 | 187475 | 187480 | 187483 | 187728