diff options
Diffstat (limited to 'libs/hwui/OpenGLRenderer.cpp')
| -rw-r--r-- | libs/hwui/OpenGLRenderer.cpp | 618 |
1 files changed, 618 insertions, 0 deletions
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp new file mode 100644 index 0000000..027ed79 --- /dev/null +++ b/libs/hwui/OpenGLRenderer.cpp @@ -0,0 +1,618 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define LOG_TAG "OpenGLRenderer" + +#include <stdlib.h> +#include <stdint.h> +#include <sys/types.h> + +#include <SkCanvas.h> + +#include <cutils/properties.h> +#include <utils/Log.h> + +#include "OpenGLRenderer.h" + +namespace android { +namespace uirenderer { + +/////////////////////////////////////////////////////////////////////////////// +// Defines +/////////////////////////////////////////////////////////////////////////////// + +// These properties are defined in mega-bytes +#define PROPERTY_TEXTURE_CACHE_SIZE "ro.hwui.texture_cache_size" +#define PROPERTY_LAYER_CACHE_SIZE "ro.hwui.layer_cache_size" + +#define DEFAULT_TEXTURE_CACHE_SIZE 20 +#define DEFAULT_LAYER_CACHE_SIZE 10 + +// Converts a number of mega-bytes into bytes +#define MB(s) s * 1024 * 1024 + +// Generates simple and textured vertices +#define SV(x, y) { { x, y } } +#define FV(x, y, u, v) { { x, y }, { u, v } } + +/////////////////////////////////////////////////////////////////////////////// +// Globals +/////////////////////////////////////////////////////////////////////////////// + +static const SimpleVertex gDrawColorVertices[] = { + SV(0.0f, 0.0f), + SV(1.0f, 0.0f), + SV(0.0f, 1.0f), + SV(1.0f, 1.0f) +}; +static const GLsizei gDrawColorVertexStride = sizeof(SimpleVertex); +static const GLsizei gDrawColorVertexCount = 4; + +// This array is never used directly but used as a memcpy source in the +// OpenGLRenderer constructor +static const TextureVertex gDrawTextureVertices[] = { + FV(0.0f, 0.0f, 0.0f, 0.0f), + FV(1.0f, 0.0f, 1.0f, 0.0f), + FV(0.0f, 1.0f, 0.0f, 1.0f), + FV(1.0f, 1.0f, 1.0f, 1.0f) +}; +static const GLsizei gDrawTextureVertexStride = sizeof(TextureVertex); +static const GLsizei gDrawTextureVertexCount = 4; + +// In this array, the index of each Blender equals the value of the first +// entry. For instance, gBlends[1] == gBlends[SkXfermode::kSrc_Mode] +static const Blender gBlends[] = { + { SkXfermode::kClear_Mode, GL_ZERO, GL_ZERO }, + { SkXfermode::kSrc_Mode, GL_ONE, GL_ZERO }, + { SkXfermode::kDst_Mode, GL_ZERO, GL_ONE }, + { SkXfermode::kSrcOver_Mode, GL_ONE, GL_ONE_MINUS_SRC_ALPHA }, + { SkXfermode::kDstOver_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE }, + { SkXfermode::kSrcIn_Mode, GL_DST_ALPHA, GL_ZERO }, + { SkXfermode::kDstIn_Mode, GL_ZERO, GL_SRC_ALPHA }, + { SkXfermode::kSrcOut_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ZERO }, + { SkXfermode::kDstOut_Mode, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA }, + { SkXfermode::kSrcATop_Mode, GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA }, + { SkXfermode::kDstATop_Mode, GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA }, + { SkXfermode::kXor_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA } +}; + +/////////////////////////////////////////////////////////////////////////////// +// Constructors/destructor +/////////////////////////////////////////////////////////////////////////////// + +OpenGLRenderer::OpenGLRenderer(): + mTextureCache(MB(DEFAULT_TEXTURE_CACHE_SIZE)), + mLayerCache(MB(DEFAULT_LAYER_CACHE_SIZE)) { + LOGD("Create OpenGLRenderer"); + + char property[PROPERTY_VALUE_MAX]; + if (property_get(PROPERTY_TEXTURE_CACHE_SIZE, property, NULL) > 0) { + LOGD(" Setting texture cache size to %sMB", property); + mTextureCache.setMaxSize(MB(atoi(property))); + } else { + LOGD(" Using default texture cache size of %dMB", DEFAULT_TEXTURE_CACHE_SIZE); + } + + if (property_get(PROPERTY_LAYER_CACHE_SIZE, property, NULL) > 0) { + LOGD(" Setting layer cache size to %sMB", property); + mLayerCache.setMaxSize(MB(atoi(property))); + } else { + LOGD(" Using default layer cache size of %dMB", DEFAULT_LAYER_CACHE_SIZE); + } + + mDrawColorShader = new DrawColorProgram; + mDrawTextureShader = new DrawTextureProgram; + + memcpy(mDrawTextureVertices, gDrawTextureVertices, sizeof(gDrawTextureVertices)); +} + +OpenGLRenderer::~OpenGLRenderer() { + LOGD("Destroy OpenGLRenderer"); + + mTextureCache.clear(); + mLayerCache.clear(); +} + +/////////////////////////////////////////////////////////////////////////////// +// Setup +/////////////////////////////////////////////////////////////////////////////// + +void OpenGLRenderer::setViewport(int width, int height) { + glViewport(0, 0, width, height); + + mat4 ortho; + ortho.loadOrtho(0, width, height, 0, -1, 1); + ortho.copyTo(mOrthoMatrix); + + mWidth = width; + mHeight = height; + mFirstSnapshot.height = height; +} + +void OpenGLRenderer::prepare() { + mSnapshot = &mFirstSnapshot; + mSaveCount = 0; + + glDisable(GL_SCISSOR_TEST); + + glClearColor(0.0f, 0.0f, 0.0f, 0.0f); + glClear(GL_COLOR_BUFFER_BIT); + + glEnable(GL_SCISSOR_TEST); + glScissor(0, 0, mWidth, mHeight); + + mSnapshot->clipRect.set(0.0f, 0.0f, mWidth, mHeight); +} + +/////////////////////////////////////////////////////////////////////////////// +// State management +/////////////////////////////////////////////////////////////////////////////// + +int OpenGLRenderer::getSaveCount() const { + return mSaveCount; +} + +int OpenGLRenderer::save(int flags) { + return saveSnapshot(); +} + +void OpenGLRenderer::restore() { + if (mSaveCount == 0) return; + + if (restoreSnapshot()) { + setScissorFromClip(); + } +} + +void OpenGLRenderer::restoreToCount(int saveCount) { + if (saveCount <= 0 || saveCount > mSaveCount) return; + + bool restoreClip = false; + + while (mSaveCount != saveCount - 1) { + restoreClip |= restoreSnapshot(); + } + + if (restoreClip) { + setScissorFromClip(); + } +} + +int OpenGLRenderer::saveSnapshot() { + mSnapshot = new Snapshot(mSnapshot); + return ++mSaveCount; +} + +bool OpenGLRenderer::restoreSnapshot() { + bool restoreClip = mSnapshot->flags & Snapshot::kFlagClipSet; + bool restoreLayer = mSnapshot->flags & Snapshot::kFlagIsLayer; + bool restoreOrtho = mSnapshot->flags & Snapshot::kFlagDirtyOrtho; + + sp<Snapshot> current = mSnapshot; + sp<Snapshot> previous = mSnapshot->previous; + + if (restoreOrtho) { + memcpy(mOrthoMatrix, current->orthoMatrix, sizeof(mOrthoMatrix)); + } + + if (restoreLayer) { + composeLayer(current, previous); + } + + mSnapshot = previous; + mSaveCount--; + + return restoreClip; +} + +void OpenGLRenderer::composeLayer(sp<Snapshot> current, sp<Snapshot> previous) { + if (!current->layer) { + LOGE("Attempting to compose a layer that does not exist"); + return; + } + + // Unbind current FBO and restore previous one + // Most of the time, previous->fbo will be 0 to bind the default buffer + glBindFramebuffer(GL_FRAMEBUFFER, previous->fbo); + + // Restore the clip from the previous snapshot + const Rect& clip = previous->getMappedClip(); + glScissor(clip.left, mHeight - clip.bottom, clip.getWidth(), clip.getHeight()); + + Layer* layer = current->layer; + + // Compute the correct texture coordinates for the FBO texture + // The texture is currently as big as the window but drawn with + // a quad of the appropriate size + const Rect& rect = layer->layer; + + drawTextureRect(rect.left, rect.top, rect.right, rect.bottom, + layer->texture, layer->alpha, layer->mode, layer->blend, true); + + LayerSize size(rect.getWidth(), rect.getHeight()); + // Failing to add the layer to the cache should happen only if the + // layer is too large + if (!mLayerCache.put(size, layer)) { + LAYER_LOGD("Deleting layer"); + + glDeleteFramebuffers(1, &layer->fbo); + glDeleteTextures(1, &layer->texture); + + delete layer; + } +} + +/////////////////////////////////////////////////////////////////////////////// +// Layers +/////////////////////////////////////////////////////////////////////////////// + +int OpenGLRenderer::saveLayer(float left, float top, float right, float bottom, + const SkPaint* p, int flags) { + int count = saveSnapshot(); + + int alpha = 255; + SkXfermode::Mode mode; + + if (p) { + alpha = p->getAlpha(); + const bool isMode = SkXfermode::IsMode(p->getXfermode(), &mode); + if (!isMode) { + // Assume SRC_OVER + mode = SkXfermode::kSrcOver_Mode; + } + } else { + mode = SkXfermode::kSrcOver_Mode; + } + + createLayer(mSnapshot, left, top, right, bottom, alpha, mode, flags); + + return count; +} + +int OpenGLRenderer::saveLayerAlpha(float left, float top, float right, float bottom, + int alpha, int flags) { + int count = saveSnapshot(); + createLayer(mSnapshot, left, top, right, bottom, alpha, SkXfermode::kSrcOver_Mode, flags); + return count; +} + +bool OpenGLRenderer::createLayer(sp<Snapshot> snapshot, float left, float top, + float right, float bottom, int alpha, SkXfermode::Mode mode,int flags) { + + LAYER_LOGD("Requesting layer %dx%d", size.width, size.height); + LAYER_LOGD("Layer cache size = %d", mLayerCache.getSize()); + + GLuint previousFbo = snapshot->previous.get() ? snapshot->previous->fbo : 0; + LayerSize size(right - left, bottom - top); + + // TODO VERY IMPORTANT: Fix TextView to not call saveLayer() all the time + Layer* layer = mLayerCache.get(size, previousFbo); + if (!layer) { + return false; + } + + glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo); + + // Clear the FBO + glDisable(GL_SCISSOR_TEST); + glClearColor(0.0f, 0.0f, 0.0f, 0.0f); + glClear(GL_COLOR_BUFFER_BIT); + glEnable(GL_SCISSOR_TEST); + + // Save the layer in the snapshot + snapshot->flags |= Snapshot::kFlagIsLayer; + layer->mode = mode; + layer->alpha = alpha / 255.0f; + layer->layer.set(left, top, right, bottom); + + snapshot->layer = layer; + snapshot->fbo = layer->fbo; + + // Creates a new snapshot to draw into the FBO + saveSnapshot(); + // TODO: This doesn't preserve other transformations (check Skia first) + mSnapshot->transform.loadTranslate(-left, -top, 0.0f); + mSnapshot->clipRect.set(left, top, right, bottom); + mSnapshot->height = bottom - top; + setScissorFromClip(); + + mSnapshot->flags = Snapshot::kFlagDirtyTransform | Snapshot::kFlagDirtyOrtho | + Snapshot::kFlagClipSet; + memcpy(mSnapshot->orthoMatrix, mOrthoMatrix, sizeof(mOrthoMatrix)); + + // Change the ortho projection + mat4 ortho; + ortho.loadOrtho(0.0f, right - left, bottom - top, 0.0f, 0.0f, 1.0f); + ortho.copyTo(mOrthoMatrix); + + return true; +} + +/////////////////////////////////////////////////////////////////////////////// +// Transforms +/////////////////////////////////////////////////////////////////////////////// + +void OpenGLRenderer::translate(float dx, float dy) { + mSnapshot->transform.translate(dx, dy, 0.0f); + mSnapshot->flags |= Snapshot::kFlagDirtyTransform; +} + +void OpenGLRenderer::rotate(float degrees) { + mSnapshot->transform.rotate(degrees, 0.0f, 0.0f, 1.0f); + mSnapshot->flags |= Snapshot::kFlagDirtyTransform; +} + +void OpenGLRenderer::scale(float sx, float sy) { + mSnapshot->transform.scale(sx, sy, 1.0f); + mSnapshot->flags |= Snapshot::kFlagDirtyTransform; +} + +void OpenGLRenderer::setMatrix(SkMatrix* matrix) { + mSnapshot->transform.load(*matrix); + mSnapshot->flags |= Snapshot::kFlagDirtyTransform; +} + +void OpenGLRenderer::getMatrix(SkMatrix* matrix) { + mSnapshot->transform.copyTo(*matrix); +} + +void OpenGLRenderer::concatMatrix(SkMatrix* matrix) { + mat4 m(*matrix); + mSnapshot->transform.multiply(m); + mSnapshot->flags |= Snapshot::kFlagDirtyTransform; +} + +/////////////////////////////////////////////////////////////////////////////// +// Clipping +/////////////////////////////////////////////////////////////////////////////// + +void OpenGLRenderer::setScissorFromClip() { + const Rect& clip = mSnapshot->getMappedClip(); + glScissor(clip.left, mSnapshot->height - clip.bottom, clip.getWidth(), clip.getHeight()); +} + +const Rect& OpenGLRenderer::getClipBounds() { + return mSnapshot->clipRect; +} + +bool OpenGLRenderer::quickReject(float left, float top, float right, float bottom) { + /* + * The documentation of quickReject() indicates that the specified rect + * is transformed before being compared to the clip rect. However, the + * clip rect is not stored transformed in the snapshot and can thus be + * compared directly + * + * The following code can be used instead to performed a mapped comparison: + * + * mSnapshot->transform.mapRect(r); + * const Rect& clip = mSnapshot->getMappedClip(); + * return !clip.intersects(r); + */ + Rect r(left, top, right, bottom); + return !mSnapshot->clipRect.intersects(r); +} + +bool OpenGLRenderer::clipRect(float left, float top, float right, float bottom) { + bool clipped = mSnapshot->clipRect.intersect(left, top, right, bottom); + if (clipped) { + mSnapshot->flags |= Snapshot::kFlagClipSet; + setScissorFromClip(); + } + return clipped; +} + +/////////////////////////////////////////////////////////////////////////////// +// Drawing +/////////////////////////////////////////////////////////////////////////////// + +void OpenGLRenderer::drawBitmap(SkBitmap* bitmap, float left, float top, const SkPaint* paint) { + const Texture* texture = mTextureCache.get(bitmap); + + int alpha; + SkXfermode::Mode mode; + getAlphaAndMode(paint, &alpha, &mode); + + drawTextureRect(left, top, left + texture->width, top + texture->height, texture->id, + alpha / 255.0f, mode, texture->blend, true); +} + +void OpenGLRenderer::drawBitmap(SkBitmap* bitmap, const SkMatrix* matrix, const SkPaint* paint) { + Rect r(0.0f, 0.0f, bitmap->width(), bitmap->height()); + const mat4 transform(*matrix); + transform.mapRect(r); + + const Texture* texture = mTextureCache.get(bitmap); + + int alpha; + SkXfermode::Mode mode; + getAlphaAndMode(paint, &alpha, &mode); + + drawTextureRect(r.left, r.top, r.right, r.bottom, texture->id, + alpha / 255.0f, mode, texture->blend, true); +} + +void OpenGLRenderer::drawBitmap(SkBitmap* bitmap, + float srcLeft, float srcTop, float srcRight, float srcBottom, + float dstLeft, float dstTop, float dstRight, float dstBottom, + const SkPaint* paint) { + const Texture* texture = mTextureCache.get(bitmap); + + int alpha; + SkXfermode::Mode mode; + getAlphaAndMode(paint, &alpha, &mode); + + const float width = texture->width; + const float height = texture->height; + + const float u1 = srcLeft / width; + const float v1 = srcTop / height; + const float u2 = srcRight / width; + const float v2 = srcBottom / height; + + resetDrawTextureTexCoords(u1, v1, u2, v2); + + drawTextureRect(dstLeft, dstTop, dstRight, dstBottom, texture->id, + alpha / 255.0f, mode, texture->blend, true); + + resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); +} + +void OpenGLRenderer::drawPatch(SkBitmap* bitmap, Res_png_9patch* patch, + float left, float top, float right, float bottom, const SkPaint* paint) { + // TODO: Implement + LOGD("Draw 9patch, paddingLeft=%d", patch->paddingLeft); +} + +void OpenGLRenderer::drawColor(int color, SkXfermode::Mode mode) { + const Rect& clip = mSnapshot->clipRect; + drawColorRect(clip.left, clip.top, clip.right, clip.bottom, color, mode); +} + +void OpenGLRenderer::drawRect(float left, float top, float right, float bottom, const SkPaint* p) { + SkXfermode::Mode mode; + + const bool isMode = SkXfermode::IsMode(p->getXfermode(), &mode); + if (!isMode) { + // Assume SRC_OVER + mode = SkXfermode::kSrcOver_Mode; + } + + // Skia draws using the color's alpha channel if < 255 + // Otherwise, it uses the paint's alpha + int color = p->getColor(); + if (((color >> 24) & 0xFF) == 255) { + color |= p->getAlpha() << 24; + } + + drawColorRect(left, top, right, bottom, color, mode); +} + +void OpenGLRenderer::drawColorRect(float left, float top, float right, float bottom, + int color, SkXfermode::Mode mode) { + const int alpha = (color >> 24) & 0xFF; + const bool blend = alpha < 255 || mode != SkXfermode::kSrcOver_Mode; + + const GLfloat a = alpha / 255.0f; + const GLfloat r = ((color >> 16) & 0xFF) / 255.0f; + const GLfloat g = ((color >> 8) & 0xFF) / 255.0f; + const GLfloat b = ((color ) & 0xFF) / 255.0f; + + if (blend) { + glEnable(GL_BLEND); + glBlendFunc(gBlends[mode].src, gBlends[mode].dst); + } + + mModelView.loadTranslate(left, top, 0.0f); + mModelView.scale(right - left, bottom - top, 1.0f); + + mDrawColorShader->use(&mOrthoMatrix[0], &mModelView.data[0], &mSnapshot->transform.data[0]); + + const GLvoid* p = &gDrawColorVertices[0].position[0]; + + glEnableVertexAttribArray(mDrawColorShader->position); + glVertexAttribPointer(mDrawColorShader->position, 2, GL_FLOAT, GL_FALSE, + gDrawColorVertexStride, p); + glVertexAttrib4f(mDrawColorShader->color, r, g, b, a); + + glDrawArrays(GL_TRIANGLE_STRIP, 0, gDrawColorVertexCount); + + glDisableVertexAttribArray(mDrawColorShader->position); + + if (blend) { + glDisable(GL_BLEND); + } +} + +void OpenGLRenderer::drawTextureRect(float left, float top, float right, float bottom, + GLuint texture, float alpha, SkXfermode::Mode mode, bool blend, bool isPremultiplied) { + mModelView.loadTranslate(left, top, 0.0f); + mModelView.scale(right - left, bottom - top, 1.0f); + + mDrawTextureShader->use(&mOrthoMatrix[0], &mModelView.data[0], &mSnapshot->transform.data[0]); + + if (blend || alpha < 1.0f || mode != SkXfermode::kSrcOver_Mode) { + GLenum sourceMode = gBlends[mode].src; + if (!isPremultiplied && sourceMode == GL_ONE) { + sourceMode = GL_SRC_ALPHA; + } + + glEnable(GL_BLEND); + glBlendFunc(sourceMode, gBlends[mode].dst); + } + + glBindTexture(GL_TEXTURE_2D, texture); + + // TODO handle tiling and filtering here + + glActiveTexture(GL_TEXTURE0); + glUniform1i(mDrawTextureShader->sampler, 0); + + const GLvoid* p = &mDrawTextureVertices[0].position[0]; + const GLvoid* t = &mDrawTextureVertices[0].texture[0]; + + glEnableVertexAttribArray(mDrawTextureShader->position); + glVertexAttribPointer(mDrawTextureShader->position, 2, GL_FLOAT, GL_FALSE, + gDrawTextureVertexStride, p); + + glEnableVertexAttribArray(mDrawTextureShader->texCoords); + glVertexAttribPointer(mDrawTextureShader->texCoords, 2, GL_FLOAT, GL_FALSE, + gDrawTextureVertexStride, t); + + glVertexAttrib4f(mDrawTextureShader->color, 1.0f, 1.0f, 1.0f, alpha); + + glDrawArrays(GL_TRIANGLE_STRIP, 0, gDrawTextureVertexCount); + + glDisableVertexAttribArray(mDrawTextureShader->position); + glDisableVertexAttribArray(mDrawTextureShader->texCoords); + + glBindTexture(GL_TEXTURE_2D, 0); + glDisable(GL_BLEND); +} + +void OpenGLRenderer::resetDrawTextureTexCoords(float u1, float v1, float u2, float v2) { + mDrawTextureVertices[0].texture[0] = u1; + mDrawTextureVertices[0].texture[1] = v1; + mDrawTextureVertices[1].texture[0] = u2; + mDrawTextureVertices[1].texture[1] = v1; + mDrawTextureVertices[2].texture[0] = u1; + mDrawTextureVertices[2].texture[1] = v2; + mDrawTextureVertices[3].texture[0] = u2; + mDrawTextureVertices[3].texture[1] = v2; +} + +void OpenGLRenderer::getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { + if (paint) { + const bool isMode = SkXfermode::IsMode(paint->getXfermode(), mode); + if (!isMode) { + // Assume SRC_OVER + *mode = SkXfermode::kSrcOver_Mode; + } + + // Skia draws using the color's alpha channel if < 255 + // Otherwise, it uses the paint's alpha + int color = paint->getColor(); + *alpha = (color >> 24) & 0xFF; + if (*alpha == 255) { + *alpha = paint->getAlpha(); + } + } else { + *mode = SkXfermode::kSrcOver_Mode; + *alpha = 255; + } +} + +}; // namespace uirenderer +}; // namespace android |