Add m-esr52 at 52.6.0

1 files changed, 280 insertions, 0 deletions

diff --git a/gfx/layers/opengl/GLBlitTextureImageHelper.cpp b/gfx/layers/opengl/GLBlitTextureImageHelper.cpp
new file mode 100644
index 000000000..8c6ac1703
--- /dev/null
+++ b/gfx/layers/opengl/GLBlitTextureImageHelper.cpp
@@ -0,0 +1,280 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=4 et sw=4 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "GLBlitTextureImageHelper.h"
+#include "GLUploadHelpers.h"
+#include "DecomposeIntoNoRepeatTriangles.h"
+#include "GLContext.h"
+#include "GLTextureImage.h"
+#include "ScopedGLHelpers.h"
+#include "nsRect.h"
+#include "gfx2DGlue.h"
+#include "gfxUtils.h"
+#include "CompositorOGL.h"
+#include "mozilla/gfx/Point.h"
+
+using namespace mozilla::gl;
+
+namespace mozilla {
+namespace layers {
+
+GLBlitTextureImageHelper::GLBlitTextureImageHelper(CompositorOGL* aCompositor)
+    : mCompositor(aCompositor)
+    , mBlitProgram(0)
+    , mBlitFramebuffer(0)
+
+{
+}
+
+GLBlitTextureImageHelper::~GLBlitTextureImageHelper()
+{
+    GLContext *gl = mCompositor->gl();
+    // Likely used by OGL Layers.
+    gl->fDeleteProgram(mBlitProgram);
+    gl->fDeleteFramebuffers(1, &mBlitFramebuffer);
+}
+
+void
+GLBlitTextureImageHelper::BlitTextureImage(TextureImage *aSrc, const gfx::IntRect& aSrcRect,
+                                           TextureImage *aDst, const gfx::IntRect& aDstRect)
+{
+    GLContext *gl = mCompositor->gl();
+
+    if (!aSrc || !aDst || aSrcRect.IsEmpty() || aDstRect.IsEmpty())
+        return;
+
+    int savedFb = 0;
+    gl->fGetIntegerv(LOCAL_GL_FRAMEBUFFER_BINDING, &savedFb);
+
+    ScopedGLState scopedScissorTestState(gl, LOCAL_GL_SCISSOR_TEST, false);
+    ScopedGLState scopedBlendState(gl, LOCAL_GL_BLEND, false);
+
+    // 2.0 means scale up by two
+    float blitScaleX = float(aDstRect.width) / float(aSrcRect.width);
+    float blitScaleY = float(aDstRect.height) / float(aSrcRect.height);
+
+    // We start iterating over all destination tiles
+    aDst->BeginBigImageIteration();
+    do {
+        // calculate portion of the tile that is going to be painted to
+        gfx::IntRect dstSubRect;
+        gfx::IntRect dstTextureRect = aDst->GetTileRect();
+        dstSubRect.IntersectRect(aDstRect, dstTextureRect);
+
+        // this tile is not part of the destination rectangle aDstRect
+        if (dstSubRect.IsEmpty())
+            continue;
+
+        // (*) transform the rect of this tile into the rectangle defined by aSrcRect...
+        gfx::IntRect dstInSrcRect(dstSubRect);
+        dstInSrcRect.MoveBy(-aDstRect.TopLeft());
+        // ...which might be of different size, hence scale accordingly
+        dstInSrcRect.ScaleRoundOut(1.0f / blitScaleX, 1.0f / blitScaleY);
+        dstInSrcRect.MoveBy(aSrcRect.TopLeft());
+
+        SetBlitFramebufferForDestTexture(aDst->GetTextureID());
+        UseBlitProgram();
+
+        aSrc->BeginBigImageIteration();
+        // now iterate over all tiles in the source Image...
+        do {
+            // calculate portion of the source tile that is in the source rect
+            gfx::IntRect srcSubRect;
+            gfx::IntRect srcTextureRect = aSrc->GetTileRect();
+            srcSubRect.IntersectRect(aSrcRect, srcTextureRect);
+
+            // this tile is not part of the source rect
+            if (srcSubRect.IsEmpty()) {
+                continue;
+            }
+            // calculate intersection of source rect with destination rect
+            srcSubRect.IntersectRect(srcSubRect, dstInSrcRect);
+            // this tile does not overlap the current destination tile
+            if (srcSubRect.IsEmpty()) {
+                continue;
+            }
+            // We now have the intersection of
+            //     the current source tile
+            // and the desired source rectangle
+            // and the destination tile
+            // and the desired destination rectange
+            // in destination space.
+            // We need to transform this back into destination space, inverting the transform from (*)
+            gfx::IntRect srcSubInDstRect(srcSubRect);
+            srcSubInDstRect.MoveBy(-aSrcRect.TopLeft());
+            srcSubInDstRect.ScaleRoundOut(blitScaleX, blitScaleY);
+            srcSubInDstRect.MoveBy(aDstRect.TopLeft());
+
+            // we transform these rectangles to be relative to the current src and dst tiles, respectively
+            gfx::IntSize srcSize = srcTextureRect.Size();
+            gfx::IntSize dstSize = dstTextureRect.Size();
+            srcSubRect.MoveBy(-srcTextureRect.x, -srcTextureRect.y);
+            srcSubInDstRect.MoveBy(-dstTextureRect.x, -dstTextureRect.y);
+
+            float dx0 = 2.0f * float(srcSubInDstRect.x) / float(dstSize.width) - 1.0f;
+            float dy0 = 2.0f * float(srcSubInDstRect.y) / float(dstSize.height) - 1.0f;
+            float dx1 = 2.0f * float(srcSubInDstRect.x + srcSubInDstRect.width) / float(dstSize.width) - 1.0f;
+            float dy1 = 2.0f * float(srcSubInDstRect.y + srcSubInDstRect.height) / float(dstSize.height) - 1.0f;
+            ScopedViewportRect autoViewportRect(gl, 0, 0, dstSize.width, dstSize.height);
+
+            RectTriangles rects;
+
+            gfx::IntSize realTexSize = srcSize;
+            if (!CanUploadNonPowerOfTwo(gl)) {
+                realTexSize = gfx::IntSize(RoundUpPow2(srcSize.width),
+                                           RoundUpPow2(srcSize.height));
+            }
+
+            if (aSrc->GetWrapMode() == LOCAL_GL_REPEAT) {
+                rects.addRect(/* dest rectangle */
+                        dx0, dy0, dx1, dy1,
+                        /* tex coords */
+                        srcSubRect.x / float(realTexSize.width),
+                        srcSubRect.y / float(realTexSize.height),
+                        srcSubRect.XMost() / float(realTexSize.width),
+                        srcSubRect.YMost() / float(realTexSize.height));
+            } else {
+                DecomposeIntoNoRepeatTriangles(srcSubRect, realTexSize, rects);
+
+                // now put the coords into the d[xy]0 .. d[xy]1 coordinate space
+                // from the 0..1 that it comes out of decompose
+                InfallibleTArray<RectTriangles::coord>& coords = rects.vertCoords();
+
+                for (unsigned int i = 0; i < coords.Length(); ++i) {
+                    coords[i].x = (coords[i].x * (dx1 - dx0)) + dx0;
+                    coords[i].y = (coords[i].y * (dy1 - dy0)) + dy0;
+                }
+            }
+
+            ScopedBindTextureUnit autoTexUnit(gl, LOCAL_GL_TEXTURE0);
+            ScopedBindTexture autoTex(gl, aSrc->GetTextureID());
+            ScopedVertexAttribPointer autoAttrib0(gl, 0, 2, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0, rects.vertCoords().Elements());
+            ScopedVertexAttribPointer autoAttrib1(gl, 1, 2, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0, rects.texCoords().Elements());
+
+            gl->fDrawArrays(LOCAL_GL_TRIANGLES, 0, rects.elements());
+
+        } while (aSrc->NextTile());
+    } while (aDst->NextTile());
+
+    // unbind the previous texture from the framebuffer
+    SetBlitFramebufferForDestTexture(0);
+
+    gl->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, savedFb);
+}
+
+void
+GLBlitTextureImageHelper::SetBlitFramebufferForDestTexture(GLuint aTexture)
+{
+    GLContext *gl = mCompositor->gl();
+    if (!mBlitFramebuffer) {
+        gl->fGenFramebuffers(1, &mBlitFramebuffer);
+    }
+
+    gl->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mBlitFramebuffer);
+    gl->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
+                               LOCAL_GL_COLOR_ATTACHMENT0,
+                               LOCAL_GL_TEXTURE_2D,
+                               aTexture,
+                               0);
+
+    GLenum result = gl->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
+    if (aTexture && (result != LOCAL_GL_FRAMEBUFFER_COMPLETE)) {
+        nsAutoCString msg;
+        msg.AppendLiteral("Framebuffer not complete -- error 0x");
+        msg.AppendInt(result, 16);
+        // Note: if you are hitting this, it is likely that
+        // your texture is not texture complete -- that is, you
+        // allocated a texture name, but didn't actually define its
+        // size via a call to TexImage2D.
+        NS_RUNTIMEABORT(msg.get());
+    }
+}
+
+void
+GLBlitTextureImageHelper::UseBlitProgram()
+{
+    // XXX: GLBlitTextureImageHelper doesn't use ShaderProgramOGL
+    // so we need to Reset the program
+    mCompositor->ResetProgram();
+
+    GLContext *gl = mCompositor->gl();
+    if (mBlitProgram) {
+        gl->fUseProgram(mBlitProgram);
+        return;
+    }
+
+    mBlitProgram = gl->fCreateProgram();
+
+    GLuint shaders[2];
+    shaders[0] = gl->fCreateShader(LOCAL_GL_VERTEX_SHADER);
+    shaders[1] = gl->fCreateShader(LOCAL_GL_FRAGMENT_SHADER);
+
+    const char *blitVSSrc =
+        "attribute vec2 aVertex;"
+        "attribute vec2 aTexCoord;"
+        "varying vec2 vTexCoord;"
+        "void main() {"
+        "  vTexCoord = aTexCoord;"
+        "  gl_Position = vec4(aVertex, 0.0, 1.0);"
+        "}";
+    const char *blitFSSrc = "#ifdef GL_ES\nprecision mediump float;\n#endif\n"
+        "uniform sampler2D uSrcTexture;"
+        "varying vec2 vTexCoord;"
+        "void main() {"
+        "  gl_FragColor = texture2D(uSrcTexture, vTexCoord);"
+        "}";
+
+    gl->fShaderSource(shaders[0], 1, (const GLchar**) &blitVSSrc, nullptr);
+    gl->fShaderSource(shaders[1], 1, (const GLchar**) &blitFSSrc, nullptr);
+
+    for (int i = 0; i < 2; ++i) {
+        GLint success, len = 0;
+
+        gl->fCompileShader(shaders[i]);
+        gl->fGetShaderiv(shaders[i], LOCAL_GL_COMPILE_STATUS, &success);
+        NS_ASSERTION(success, "Shader compilation failed!");
+
+        if (!success) {
+            nsAutoCString log;
+            gl->fGetShaderiv(shaders[i], LOCAL_GL_INFO_LOG_LENGTH, (GLint*) &len);
+            log.SetCapacity(len);
+            gl->fGetShaderInfoLog(shaders[i], len, (GLint*) &len, (char*) log.BeginWriting());
+            log.SetLength(len);
+
+            printf_stderr("Shader %d compilation failed:\n%s\n", i, log.get());
+            return;
+        }
+
+        gl->fAttachShader(mBlitProgram, shaders[i]);
+        gl->fDeleteShader(shaders[i]);
+    }
+
+    gl->fBindAttribLocation(mBlitProgram, 0, "aVertex");
+    gl->fBindAttribLocation(mBlitProgram, 1, "aTexCoord");
+
+    gl->fLinkProgram(mBlitProgram);
+
+    GLint success, len = 0;
+    gl->fGetProgramiv(mBlitProgram, LOCAL_GL_LINK_STATUS, &success);
+    NS_ASSERTION(success, "Shader linking failed!");
+
+    if (!success) {
+        nsAutoCString log;
+        gl->fGetProgramiv(mBlitProgram, LOCAL_GL_INFO_LOG_LENGTH, (GLint*) &len);
+        log.SetCapacity(len);
+        gl->fGetProgramInfoLog(mBlitProgram, len, (GLint*) &len, (char*) log.BeginWriting());
+        log.SetLength(len);
+
+        printf_stderr("Program linking failed:\n%s\n", log.get());
+        return;
+    }
+
+    gl->fUseProgram(mBlitProgram);
+    gl->fUniform1i(gl->fGetUniformLocation(mBlitProgram, "uSrcTexture"), 0);
+}
+
+} // namespace layers
+} // namespace mozilla