Migrate most of cc/ from WebKit::WebTransformationMatrix to gfx::Transform

cc/gl_renderer.cc

 // Copyright 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/gl_renderer.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
@@ skipping 25 matching lines @@
 #include <public/WebGraphicsContext3D.h>
 #include <public/WebSharedGraphicsContext3D.h>
 #include <set>
 #include <string>
 #include <vector>
 
 using namespace std;
 using WebKit::WebGraphicsContext3D;
 using WebKit::WebGraphicsMemoryAllocation;
 using WebKit::WebSharedGraphicsContext3D;
-using WebKit::WebTransformationMatrix;
+using gfx::Transform;
 
 namespace cc {
 
 namespace {
 
 bool needsIOSurfaceReadbackWorkaround()
 {
 #if defined(OS_MACOSX)
     return true;
 #else
@@ skipping 265 matching lines @@
 
 void GLRenderer::drawDebugBorderQuad(const DrawingFrame& frame, const DebugBorderDrawQuad* quad)
 {
     static float glMatrix[16];
     const SolidColorProgram* program = solidColorProgram();
     DCHECK(program && (program->initialized() || isContextLost()));
     GLC(context(), context()->useProgram(program->program()));
 
     // Use the full quadRect for debug quads to not move the edges based on partial swaps.
     const gfx::Rect& layerRect = quad->rect;
-    WebTransformationMatrix renderMatrix = quad->quadTransform();
-    renderMatrix.translate(0.5 * layerRect.width() + layerRect.x(), 0.5 * layerRect.height() + layerRect.y());
-    renderMatrix.scaleNonUniform(layerRect.width(), layerRect.height());
+    Transform renderMatrix = quad->quadTransform();
+    renderMatrix.PreconcatTranslate(0.5 * layerRect.width() + layerRect.x(), 0.5 * layerRect.height() + layerRect.y());
+    renderMatrix.PreconcatScale(layerRect.width(), layerRect.height());
     GLRenderer::toGLMatrix(&glMatrix[0], frame.projectionMatrix * renderMatrix);
     GLC(context(), context()->uniformMatrix4fv(program->vertexShader().matrixLocation(), 1, false, &glMatrix[0]));
 
     SkColor color = quad->color;
     float alpha = SkColorGetA(color) / 255.0;
 
     GLC(context(), context()->uniform4f(program->fragmentShader().colorLocation(), (SkColorGetR(color) / 255.0) * alpha, (SkColorGetG(color) / 255.0) * alpha, (SkColorGetB(color) / 255.0) * alpha, alpha));
 
     GLC(context(), context()->lineWidth(quad->width));
 
@@ skipping 83 matching lines @@
     canvas.clear(0x0);
     canvas.drawSprite(source, 0, 0, &paint);
     canvas.flush();
     context3d->flush();
     return device.accessBitmap(false);
 }
 
 scoped_ptr<ScopedResource> GLRenderer::drawBackgroundFilters(
     DrawingFrame& frame, const RenderPassDrawQuad* quad,
     const WebKit::WebFilterOperations& filters,
-    const WebTransformationMatrix& contentsDeviceTransform,
-    const WebTransformationMatrix& contentsDeviceTransformInverse)
+    const Transform& contentsDeviceTransform,
+    const Transform& contentsDeviceTransformInverse)
 {
     // This method draws a background filter, which applies a filter to any pixels behind the quad and seen through its background.
     // The algorithm works as follows:
     // 1. Compute a bounding box around the pixels that will be visible through the quad.
     // 2. Read the pixels in the bounding box into a buffer R.
     // 3. Apply the background filter to R, so that it is applied in the pixels' coordinate space.
     // 4. Apply the quad's inverse transform to map the pixels in R into the quad's content space. This implicitly
     // clips R by the content bounds of the quad since the destination texture has bounds matching the quad's content.
     // 5. Draw the background texture for the contents using the same transform as used to draw the contents itself. This is done
     // without blending to replace the current background pixels with the new filtered background.
@@ skipping 35 matching lines @@
 
     scoped_ptr<ScopedResource> backgroundTexture = ScopedResource::create(m_resourceProvider);
     if (!backgroundTexture->Allocate(Renderer::ImplPool, quad->rect.size(), GL_RGBA, ResourceProvider::TextureUsageFramebuffer))
         return scoped_ptr<ScopedResource>();
 
     const RenderPass* targetRenderPass = frame.currentRenderPass;
     bool usingBackgroundTexture = useScopedTexture(frame, backgroundTexture.get(), quad->rect);
 
     if (usingBackgroundTexture) {
         // Copy the readback pixels from device to the background texture for the surface.
-        WebTransformationMatrix deviceToFramebufferTransform;
-        deviceToFramebufferTransform.translate(quad->rect.width() / 2.0, quad->rect.height() / 2.0);
-        deviceToFramebufferTransform.scale3d(quad->rect.width(), quad->rect.height(), 1);
-        deviceToFramebufferTransform.multiply(contentsDeviceTransformInverse);
+        Transform deviceToFramebufferTransform;
+        deviceToFramebufferTransform.PreconcatTranslate(quad->rect.width() / 2.0, quad->rect.height() / 2.0);
+        deviceToFramebufferTransform.PreconcatScale3d(quad->rect.width(), quad->rect.height(), 1);
+        deviceToFramebufferTransform.PreconcatTransform(contentsDeviceTransformInverse);
         copyTextureToFramebuffer(frame, filteredDeviceBackgroundTextureId, deviceRect, deviceToFramebufferTransform);
     }
 
     useRenderPass(frame, targetRenderPass);
 
     if (!usingBackgroundTexture)
         return scoped_ptr<ScopedResource>();
     return backgroundTexture.Pass();
 }
 
 void GLRenderer::drawRenderPassQuad(DrawingFrame& frame, const RenderPassDrawQuad* quad)
 {
     CachedResource* contentsTexture = m_renderPassTextures.get(quad->render_pass_id);
     if (!contentsTexture || !contentsTexture->id())
         return;
 
     const RenderPass* renderPass = frame.renderPassesById->get(quad->render_pass_id);
     DCHECK(renderPass);
     if (!renderPass)
         return;
 
-    WebTransformationMatrix quadRectMatrix;
+    Transform quadRectMatrix;
     quadRectTransform(&quadRectMatrix, quad->quadTransform(), quad->rect);
-    WebTransformationMatrix contentsDeviceTransform = (frame.windowMatrix * frame.projectionMatrix * quadRectMatrix).to2dTransform();
+    Transform contentsDeviceTransform = MathUtil::to2dTransform(frame.windowMatrix * frame.projectionMatrix * quadRectMatrix);
 
     // Can only draw surface if device matrix is invertible.
-    if (!contentsDeviceTransform.isInvertible())
+    if (!contentsDeviceTransform.IsInvertible())
         return;
 
-    WebTransformationMatrix contentsDeviceTransformInverse = contentsDeviceTransform.inverse();
+    Transform contentsDeviceTransformInverse = MathUtil::inverse(contentsDeviceTransform);
     scoped_ptr<ScopedResource> backgroundTexture = drawBackgroundFilters(
         frame, quad, renderPass->background_filters,
         contentsDeviceTransform, contentsDeviceTransformInverse);
 
     // FIXME: Cache this value so that we don't have to do it for both the surface and its replica.
     // Apply filters to the contents texture.
     SkBitmap filterBitmap;
     if (renderPass->filter) {
         filterBitmap = applyImageFilter(this, renderPass->filter, contentsTexture, m_client->hasImplThread());
     } else {
@@ skipping 203 matching lines @@
 
     // Map to normalized texture coordinates.
     const gfx::Size& textureSize = quad->texture_size;
     float fragmentTexTranslateX = clampTexRect.x() / textureSize.width();
     float fragmentTexTranslateY = clampTexRect.y() / textureSize.height();
     float fragmentTexScaleX = clampTexRect.width() / textureSize.width();
     float fragmentTexScaleY = clampTexRect.height() / textureSize.height();
 
 
     gfx::QuadF localQuad;
-    WebTransformationMatrix deviceTransform = WebTransformationMatrix(frame.windowMatrix * frame.projectionMatrix * quad->quadTransform()).to2dTransform();
-    if (!deviceTransform.isInvertible())
+    Transform deviceTransform = MathUtil::to2dTransform(frame.windowMatrix * frame.projectionMatrix * quad->quadTransform());
+    if (!deviceTransform.IsInvertible())
         return;
 
     bool clipped = false;
     gfx::QuadF deviceLayerQuad = MathUtil::mapQuad(deviceTransform, gfx::QuadF(quad->visibleContentRect()), clipped);
     DCHECK(!clipped);
 
     TileProgramUniforms uniforms;
     // For now, we simply skip anti-aliasing with the quad is clipped. This only happens
     // on perspective transformed layers that go partially behind the camera.
     if (quad->IsAntialiased() && !clipped) {
@@ skipping 69 matching lines @@
         float sign = gfx::QuadF(tileRect).IsCounterClockwise() ? -1 : 1;
         bottomEdge.scale(sign);
         leftEdge.scale(sign);
         topEdge.scale(sign);
         rightEdge.scale(sign);
 
         // Create device space quad.
         LayerQuad deviceQuad(leftEdge, topEdge, rightEdge, bottomEdge);
 
         // Map device space quad to local space. deviceTransform has no 3d component since it was generated with to2dTransform() so we don't need to project.
-        WebTransformationMatrix deviceTransformInverse = deviceTransform.inverse();
+        Transform deviceTransformInverse = MathUtil::inverse(deviceTransform);
         localQuad = MathUtil::mapQuad(deviceTransformInverse, deviceQuad.ToQuadF(), clipped);
 
         // We should not DCHECK(!clipped) here, because anti-aliasing inflation may cause deviceQuad to become
         // clipped. To our knowledge this scenario does not need to be handled differently than the unclipped case.
     } else {
         // Move fragment shader transform to vertex shader. We can do this while
         // still producing correct results as fragmentTexTransformLocation
         // should always be non-negative when tiles are transformed in a way
         // that could result in sampling outside the layer.
         vertexTexScaleX *= fragmentTexScaleX;
@@ skipping 202 matching lines @@
 
 void GLRenderer::ensureScissorTestDisabled()
 {
     if (!m_isScissorEnabled)
         return;
 
     GLC(m_context, m_context->disable(GL_SCISSOR_TEST));
     m_isScissorEnabled = false;
 }
 
-void GLRenderer::toGLMatrix(float* flattened, const WebTransformationMatrix& m)
+void GLRenderer::toGLMatrix(float* glMatrix, const Transform& transform)
 {
-    flattened[0] = m.m11();
-    flattened[1] = m.m12();
-    flattened[2] = m.m13();
-    flattened[3] = m.m14();
-    flattened[4] = m.m21();
-    flattened[5] = m.m22();
-    flattened[6] = m.m23();
-    flattened[7] = m.m24();
-    flattened[8] = m.m31();
-    flattened[9] = m.m32();
-    flattened[10] = m.m33();
-    flattened[11] = m.m34();
-    flattened[12] = m.m41();
-    flattened[13] = m.m42();
-    flattened[14] = m.m43();
-    flattened[15] = m.m44();
+    transform.matrix().asColMajorf(glMatrix);
 }
 
 void GLRenderer::setShaderQuadF(const gfx::QuadF& quad, int quadLocation)
 {
     if (quadLocation == -1)
         return;
 
     float point[8];
     point[0] = quad.p1().x();
     point[1] = quad.p1().y();
     point[2] = quad.p2().x();
     point[3] = quad.p2().y();
     point[4] = quad.p3().x();
     point[5] = quad.p3().y();
     point[6] = quad.p4().x();
     point[7] = quad.p4().y();
     GLC(m_context, m_context->uniform2fv(quadLocation, 4, point));
 }
 
 void GLRenderer::setShaderOpacity(float opacity, int alphaLocation)
 {
     if (alphaLocation != -1)
         GLC(m_context, m_context->uniform1f(alphaLocation, opacity));
 }
 
-void GLRenderer::drawQuadGeometry(const DrawingFrame& frame, const WebKit::WebTransformationMatrix& drawTransform, const gfx::RectF& quadRect, int matrixLocation)
+void GLRenderer::drawQuadGeometry(const DrawingFrame& frame, const gfx::Transform& drawTransform, const gfx::RectF& quadRect, int matrixLocation)
 {
-    WebTransformationMatrix quadRectMatrix;
+    Transform quadRectMatrix;
     quadRectTransform(&quadRectMatrix, drawTransform, quadRect);
     static float glMatrix[16];
     toGLMatrix(&glMatrix[0], frame.projectionMatrix * quadRectMatrix);
     GLC(m_context, m_context->uniformMatrix4fv(matrixLocation, 1, false, &glMatrix[0]));
 
     GLC(m_context, m_context->drawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0));
 }
 
-void GLRenderer::copyTextureToFramebuffer(const DrawingFrame& frame, int textureId, const gfx::Rect& rect, const WebTransformationMatrix& drawMatrix)
+void GLRenderer::copyTextureToFramebuffer(const DrawingFrame& frame, int textureId, const gfx::Rect& rect, const Transform& drawMatrix)
 {
     const RenderPassProgram* program = renderPassProgram();
 
     GLC(context(), context()->bindTexture(GL_TEXTURE_2D, textureId));
 
     GLC(context(), context()->useProgram(program->program()));
     GLC(context(), context()->uniform1i(program->fragmentShader().samplerLocation(), 0));
     setShaderOpacity(1, program->fragmentShader().alphaLocation());
     drawQuadGeometry(frame, drawMatrix, rect, program->vertexShader().matrixLocation());
 }
@@ skipping 510 matching lines @@
 
     releaseRenderPassTextures();
 }
 
 bool GLRenderer::isContextLost()
 {
     return (m_context->getGraphicsResetStatusARB() != GL_NO_ERROR);
 }
 
 }  // namespace cc