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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 #include "GlopBuilder.h"
     17 
     18 #include "Caches.h"
     19 #include "GlLayer.h"
     20 #include "Glop.h"
     21 #include "Layer.h"
     22 #include "Matrix.h"
     23 #include "Patch.h"
     24 #include "PathCache.h"
     25 #include "renderstate/MeshState.h"
     26 #include "renderstate/RenderState.h"
     27 #include "SkiaShader.h"
     28 #include "Texture.h"
     29 #include "utils/PaintUtils.h"
     30 #include "VertexBuffer.h"
     31 
     32 #include <GLES2/gl2.h>
     33 #include <SkPaint.h>
     34 
     35 #define DEBUG_GLOP_BUILDER 0
     36 
     37 #if DEBUG_GLOP_BUILDER
     38 
     39 #define TRIGGER_STAGE(stageFlag) \
     40     LOG_ALWAYS_FATAL_IF((stageFlag) & mStageFlags, "Stage %d cannot be run twice", (stageFlag)); \
     41     mStageFlags = static_cast<StageFlags>(mStageFlags | (stageFlag))
     42 
     43 #define REQUIRE_STAGES(requiredFlags) \
     44     LOG_ALWAYS_FATAL_IF((mStageFlags & (requiredFlags)) != (requiredFlags), \
     45             "not prepared for current stage")
     46 
     47 #else
     48 
     49 #define TRIGGER_STAGE(stageFlag) ((void)0)
     50 #define REQUIRE_STAGES(requiredFlags) ((void)0)
     51 
     52 #endif
     53 
     54 namespace android {
     55 namespace uirenderer {
     56 
     57 static void setUnitQuadTextureCoords(Rect uvs, TextureVertex* quadVertex) {
     58     quadVertex[0] = {0, 0, uvs.left, uvs.top};
     59     quadVertex[1] = {1, 0, uvs.right, uvs.top};
     60     quadVertex[2] = {0, 1, uvs.left, uvs.bottom};
     61     quadVertex[3] = {1, 1, uvs.right, uvs.bottom};
     62 }
     63 
     64 GlopBuilder::GlopBuilder(RenderState& renderState, Caches& caches, Glop* outGlop)
     65         : mRenderState(renderState)
     66         , mCaches(caches)
     67         , mShader(nullptr)
     68         , mOutGlop(outGlop) {
     69     mStageFlags = kInitialStage;
     70 }
     71 
     72 ////////////////////////////////////////////////////////////////////////////////
     73 // Mesh
     74 ////////////////////////////////////////////////////////////////////////////////
     75 
     76 GlopBuilder& GlopBuilder::setMeshTexturedIndexedVbo(GLuint vbo, GLsizei elementCount) {
     77     TRIGGER_STAGE(kMeshStage);
     78 
     79     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
     80     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
     81     mOutGlop->mesh.vertices = {
     82             vbo,
     83             VertexAttribFlags::TextureCoord,
     84             nullptr, (const void*) kMeshTextureOffset, nullptr,
     85             kTextureVertexStride };
     86     mOutGlop->mesh.elementCount = elementCount;
     87     return *this;
     88 }
     89 
     90 GlopBuilder& GlopBuilder::setMeshUnitQuad() {
     91     TRIGGER_STAGE(kMeshStage);
     92 
     93     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
     94     mOutGlop->mesh.indices = { 0, nullptr };
     95     mOutGlop->mesh.vertices = {
     96             mRenderState.meshState().getUnitQuadVBO(),
     97             VertexAttribFlags::None,
     98             nullptr, nullptr, nullptr,
     99             kTextureVertexStride };
    100     mOutGlop->mesh.elementCount = 4;
    101     return *this;
    102 }
    103 
    104 GlopBuilder& GlopBuilder::setMeshTexturedUnitQuad(const UvMapper* uvMapper) {
    105     if (uvMapper) {
    106         // can't use unit quad VBO, so build UV vertices manually
    107         return setMeshTexturedUvQuad(uvMapper, Rect(1, 1));
    108     }
    109 
    110     TRIGGER_STAGE(kMeshStage);
    111 
    112     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
    113     mOutGlop->mesh.indices = { 0, nullptr };
    114     mOutGlop->mesh.vertices = {
    115             mRenderState.meshState().getUnitQuadVBO(),
    116             VertexAttribFlags::TextureCoord,
    117             nullptr, (const void*) kMeshTextureOffset, nullptr,
    118             kTextureVertexStride };
    119     mOutGlop->mesh.elementCount = 4;
    120     return *this;
    121 }
    122 
    123 GlopBuilder& GlopBuilder::setMeshTexturedUvQuad(const UvMapper* uvMapper, Rect uvs) {
    124     TRIGGER_STAGE(kMeshStage);
    125 
    126     if (CC_UNLIKELY(uvMapper)) {
    127         uvMapper->map(uvs);
    128     }
    129     setUnitQuadTextureCoords(uvs, &mOutGlop->mesh.mappedVertices[0]);
    130 
    131     const TextureVertex* textureVertex = mOutGlop->mesh.mappedVertices;
    132     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
    133     mOutGlop->mesh.indices = { 0, nullptr };
    134     mOutGlop->mesh.vertices = {
    135             0,
    136             VertexAttribFlags::TextureCoord,
    137             &textureVertex[0].x, &textureVertex[0].u, nullptr,
    138             kTextureVertexStride };
    139     mOutGlop->mesh.elementCount = 4;
    140     return *this;
    141 }
    142 
    143 GlopBuilder& GlopBuilder::setMeshIndexedQuads(Vertex* vertexData, int quadCount) {
    144     TRIGGER_STAGE(kMeshStage);
    145 
    146     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    147     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
    148     mOutGlop->mesh.vertices = {
    149             0,
    150             VertexAttribFlags::None,
    151             vertexData, nullptr, nullptr,
    152             kVertexStride };
    153     mOutGlop->mesh.elementCount = 6 * quadCount;
    154     return *this;
    155 }
    156 
    157 GlopBuilder& GlopBuilder::setMeshTexturedIndexedQuads(TextureVertex* vertexData, int elementCount) {
    158     TRIGGER_STAGE(kMeshStage);
    159 
    160     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    161     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
    162     mOutGlop->mesh.vertices = {
    163             0,
    164             VertexAttribFlags::TextureCoord,
    165             &vertexData[0].x, &vertexData[0].u, nullptr,
    166             kTextureVertexStride };
    167     mOutGlop->mesh.elementCount = elementCount;
    168     return *this;
    169 }
    170 
    171 GlopBuilder& GlopBuilder::setMeshColoredTexturedMesh(ColorTextureVertex* vertexData, int elementCount) {
    172     TRIGGER_STAGE(kMeshStage);
    173 
    174     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    175     mOutGlop->mesh.indices = { 0, nullptr };
    176     mOutGlop->mesh.vertices = {
    177             0,
    178             VertexAttribFlags::TextureCoord | VertexAttribFlags::Color,
    179             &vertexData[0].x, &vertexData[0].u, &vertexData[0].r,
    180             kColorTextureVertexStride };
    181     mOutGlop->mesh.elementCount = elementCount;
    182     return *this;
    183 }
    184 
    185 GlopBuilder& GlopBuilder::setMeshVertexBuffer(const VertexBuffer& vertexBuffer) {
    186     TRIGGER_STAGE(kMeshStage);
    187 
    188     const VertexBuffer::MeshFeatureFlags flags = vertexBuffer.getMeshFeatureFlags();
    189 
    190     bool alphaVertex = flags & VertexBuffer::kAlpha;
    191     bool indices = flags & VertexBuffer::kIndices;
    192 
    193     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
    194     mOutGlop->mesh.indices = { 0, vertexBuffer.getIndices() };
    195     mOutGlop->mesh.vertices = {
    196             0,
    197             alphaVertex ? VertexAttribFlags::Alpha : VertexAttribFlags::None,
    198             vertexBuffer.getBuffer(), nullptr, nullptr,
    199             alphaVertex ? kAlphaVertexStride : kVertexStride };
    200     mOutGlop->mesh.elementCount = indices
    201                 ? vertexBuffer.getIndexCount() : vertexBuffer.getVertexCount();
    202     return *this;
    203 }
    204 
    205 GlopBuilder& GlopBuilder::setMeshPatchQuads(const Patch& patch) {
    206     TRIGGER_STAGE(kMeshStage);
    207 
    208     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    209     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
    210     mOutGlop->mesh.vertices = {
    211             mCaches.patchCache.getMeshBuffer(),
    212             VertexAttribFlags::TextureCoord,
    213             (void*)patch.positionOffset, (void*)patch.textureOffset, nullptr,
    214             kTextureVertexStride };
    215     mOutGlop->mesh.elementCount = patch.indexCount;
    216     return *this;
    217 }
    218 
    219 ////////////////////////////////////////////////////////////////////////////////
    220 // Fill
    221 ////////////////////////////////////////////////////////////////////////////////
    222 
    223 void GlopBuilder::setFill(int color, float alphaScale,
    224         SkBlendMode mode, Blend::ModeOrderSwap modeUsage,
    225         const SkShader* shader, const SkColorFilter* colorFilter) {
    226     if (mode != SkBlendMode::kClear) {
    227         if (!shader) {
    228             FloatColor c;
    229             c.set(color);
    230             c.r *= alphaScale;
    231             c.g *= alphaScale;
    232             c.b *= alphaScale;
    233             c.a *= alphaScale;
    234             mOutGlop->fill.color = c;
    235         } else {
    236             float alpha = (SkColorGetA(color) / 255.0f) * alphaScale;
    237             mOutGlop->fill.color = { 1, 1, 1, alpha };
    238         }
    239     } else {
    240         mOutGlop->fill.color = { 0, 0, 0, 1 };
    241     }
    242 
    243     mOutGlop->blend = { GL_ZERO, GL_ZERO };
    244     if (mOutGlop->fill.color.a < 1.0f
    245             || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
    246             || (mOutGlop->fill.texture.texture && mOutGlop->fill.texture.texture->blend)
    247             || mOutGlop->roundRectClipState
    248             || PaintUtils::isBlendedShader(shader)
    249             || PaintUtils::isBlendedColorFilter(colorFilter)
    250             || mode != SkBlendMode::kSrcOver) {
    251         if (CC_LIKELY(mode <= SkBlendMode::kScreen)) {
    252             Blend::getFactors(mode, modeUsage,
    253                     &mOutGlop->blend.src, &mOutGlop->blend.dst);
    254         } else {
    255             // These blend modes are not supported by OpenGL directly and have
    256             // to be implemented using shaders. Since the shader will perform
    257             // the blending, don't enable GL blending off here
    258             // If the blend mode cannot be implemented using shaders, fall
    259             // back to the default SrcOver blend mode instead
    260             if (CC_UNLIKELY(mCaches.extensions().hasFramebufferFetch())) {
    261                 mDescription.framebufferMode = mode;
    262                 mDescription.swapSrcDst = (modeUsage == Blend::ModeOrderSwap::Swap);
    263                 // blending in shader, don't enable
    264             } else {
    265                 // unsupported
    266                 Blend::getFactors(SkBlendMode::kSrcOver, modeUsage,
    267                         &mOutGlop->blend.src, &mOutGlop->blend.dst);
    268             }
    269         }
    270     }
    271     mShader = shader; // shader resolved in ::build()
    272 
    273     if (colorFilter) {
    274         SkColor color;
    275         SkBlendMode bmode;
    276         SkScalar srcColorMatrix[20];
    277         if (colorFilter->asColorMode(&color, &bmode)) {
    278             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::ColorFilterMode::Blend;
    279             mDescription.colorMode = bmode;
    280             mOutGlop->fill.filter.color.set(color);
    281         } else if (colorFilter->asColorMatrix(srcColorMatrix)) {
    282             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::ColorFilterMode::Matrix;
    283 
    284             float* colorMatrix = mOutGlop->fill.filter.matrix.matrix;
    285             memcpy(colorMatrix, srcColorMatrix, 4 * sizeof(float));
    286             memcpy(&colorMatrix[4], &srcColorMatrix[5], 4 * sizeof(float));
    287             memcpy(&colorMatrix[8], &srcColorMatrix[10], 4 * sizeof(float));
    288             memcpy(&colorMatrix[12], &srcColorMatrix[15], 4 * sizeof(float));
    289 
    290             // Skia uses the range [0..255] for the addition vector, but we need
    291             // the [0..1] range to apply the vector in GLSL
    292             float* colorVector = mOutGlop->fill.filter.matrix.vector;
    293             colorVector[0] = EOCF(srcColorMatrix[4]  / 255.0f);
    294             colorVector[1] = EOCF(srcColorMatrix[9]  / 255.0f);
    295             colorVector[2] = EOCF(srcColorMatrix[14] / 255.0f);
    296             colorVector[3] =      srcColorMatrix[19] / 255.0f;  // alpha is linear
    297         } else {
    298             LOG_ALWAYS_FATAL("unsupported ColorFilter");
    299         }
    300     } else {
    301         mOutGlop->fill.filterMode = ProgramDescription::ColorFilterMode::None;
    302     }
    303 }
    304 
    305 GlopBuilder& GlopBuilder::setFillTexturePaint(Texture& texture,
    306         const int textureFillFlags, const SkPaint* paint, float alphaScale) {
    307     TRIGGER_STAGE(kFillStage);
    308     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    309 
    310     GLenum filter = (textureFillFlags & TextureFillFlags::ForceFilter)
    311             ? GL_LINEAR : PaintUtils::getFilter(paint);
    312     mOutGlop->fill.texture = { &texture, filter, GL_CLAMP_TO_EDGE, nullptr };
    313 
    314     if (paint) {
    315         int color = paint->getColor();
    316         SkShader* shader = paint->getShader();
    317 
    318         if (!(textureFillFlags & TextureFillFlags::IsAlphaMaskTexture)) {
    319             // Texture defines color, so disable shaders, and reset all non-alpha color channels
    320             color |= 0x00FFFFFF;
    321             shader = nullptr;
    322         }
    323         setFill(color, alphaScale,
    324                 paint->getBlendMode(), Blend::ModeOrderSwap::NoSwap,
    325                 shader, paint->getColorFilter());
    326     } else {
    327         mOutGlop->fill.color = { alphaScale, alphaScale, alphaScale, alphaScale };
    328 
    329         if (alphaScale < 1.0f
    330                 || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
    331                 || texture.blend
    332                 || mOutGlop->roundRectClipState) {
    333             Blend::getFactors(SkBlendMode::kSrcOver, Blend::ModeOrderSwap::NoSwap,
    334                     &mOutGlop->blend.src, &mOutGlop->blend.dst);
    335         } else {
    336             mOutGlop->blend = { GL_ZERO, GL_ZERO };
    337         }
    338     }
    339 
    340     if (textureFillFlags & TextureFillFlags::IsAlphaMaskTexture) {
    341         mDescription.modulate = mOutGlop->fill.color.isNotBlack();
    342         mDescription.hasAlpha8Texture = true;
    343     } else {
    344         mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    345     }
    346     return *this;
    347 }
    348 
    349 GlopBuilder& GlopBuilder::setFillPaint(const SkPaint& paint, float alphaScale, bool shadowInterp) {
    350     TRIGGER_STAGE(kFillStage);
    351     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    352 
    353     if (CC_LIKELY(!shadowInterp)) {
    354         mOutGlop->fill.texture = {
    355                 nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    356     } else {
    357         mOutGlop->fill.texture = {
    358                 mCaches.textureState().getShadowLutTexture(),
    359                 GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    360     }
    361 
    362     setFill(paint.getColor(), alphaScale,
    363             paint.getBlendMode(), Blend::ModeOrderSwap::NoSwap,
    364             paint.getShader(), paint.getColorFilter());
    365     mDescription.useShadowAlphaInterp = shadowInterp;
    366     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    367     return *this;
    368 }
    369 
    370 GlopBuilder& GlopBuilder::setFillPathTexturePaint(PathTexture& texture,
    371         const SkPaint& paint, float alphaScale) {
    372     TRIGGER_STAGE(kFillStage);
    373     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    374 
    375     //specify invalid filter/clamp, since these are always static for PathTextures
    376     mOutGlop->fill.texture = { &texture, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    377 
    378     setFill(paint.getColor(), alphaScale,
    379             paint.getBlendMode(), Blend::ModeOrderSwap::NoSwap,
    380             paint.getShader(), paint.getColorFilter());
    381 
    382     mDescription.hasAlpha8Texture = true;
    383     mDescription.modulate = mOutGlop->fill.color.isNotBlack();
    384     return *this;
    385 }
    386 
    387 GlopBuilder& GlopBuilder::setFillShadowTexturePaint(ShadowTexture& texture, int shadowColor,
    388         const SkPaint& paint, float alphaScale) {
    389     TRIGGER_STAGE(kFillStage);
    390     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    391 
    392     //specify invalid filter/clamp, since these are always static for ShadowTextures
    393     mOutGlop->fill.texture = { &texture, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    394 
    395     const int ALPHA_BITMASK = SK_ColorBLACK;
    396     const int COLOR_BITMASK = ~ALPHA_BITMASK;
    397     if ((shadowColor & ALPHA_BITMASK) == ALPHA_BITMASK) {
    398         // shadow color is fully opaque: override its alpha with that of paint
    399         shadowColor &= paint.getColor() | COLOR_BITMASK;
    400     }
    401 
    402     setFill(shadowColor, alphaScale,
    403             paint.getBlendMode(), Blend::ModeOrderSwap::NoSwap,
    404             paint.getShader(), paint.getColorFilter());
    405 
    406     mDescription.hasAlpha8Texture = true;
    407     mDescription.modulate = mOutGlop->fill.color.isNotBlack();
    408     return *this;
    409 }
    410 
    411 GlopBuilder& GlopBuilder::setFillBlack() {
    412     TRIGGER_STAGE(kFillStage);
    413     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    414 
    415     mOutGlop->fill.texture = { nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    416     setFill(SK_ColorBLACK, 1.0f, SkBlendMode::kSrcOver, Blend::ModeOrderSwap::NoSwap,
    417             nullptr, nullptr);
    418     return *this;
    419 }
    420 
    421 GlopBuilder& GlopBuilder::setFillClear() {
    422     TRIGGER_STAGE(kFillStage);
    423     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    424 
    425     mOutGlop->fill.texture = { nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    426     setFill(SK_ColorBLACK, 1.0f, SkBlendMode::kClear, Blend::ModeOrderSwap::NoSwap,
    427             nullptr, nullptr);
    428     return *this;
    429 }
    430 
    431 GlopBuilder& GlopBuilder::setFillLayer(Texture& texture, const SkColorFilter* colorFilter,
    432         float alpha, SkBlendMode mode, Blend::ModeOrderSwap modeUsage) {
    433     TRIGGER_STAGE(kFillStage);
    434     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    435 
    436     mOutGlop->fill.texture = { &texture, GL_LINEAR, GL_CLAMP_TO_EDGE, nullptr };
    437 
    438     setFill(SK_ColorWHITE, alpha, mode, modeUsage, nullptr, colorFilter);
    439 
    440     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    441     return *this;
    442 }
    443 
    444 GlopBuilder& GlopBuilder::setFillTextureLayer(GlLayer& layer, float alpha) {
    445     TRIGGER_STAGE(kFillStage);
    446     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    447 
    448     mOutGlop->fill.texture = { &(layer.getTexture()),
    449             GL_LINEAR, GL_CLAMP_TO_EDGE, &layer.getTexTransform() };
    450 
    451     setFill(SK_ColorWHITE, alpha, layer.getMode(), Blend::ModeOrderSwap::NoSwap,
    452             nullptr, layer.getColorFilter());
    453 
    454     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    455     mDescription.hasTextureTransform = true;
    456     return *this;
    457 }
    458 
    459 GlopBuilder& GlopBuilder::setFillExternalTexture(Texture& texture, Matrix4& textureTransform,
    460         bool requiresFilter) {
    461     TRIGGER_STAGE(kFillStage);
    462     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    463 
    464     GLenum filter = requiresFilter ? GL_LINEAR : GL_NEAREST;
    465     mOutGlop->fill.texture = { &texture, filter, GL_CLAMP_TO_EDGE, &textureTransform };
    466 
    467     setFill(SK_ColorWHITE, 1.0f, SkBlendMode::kSrc, Blend::ModeOrderSwap::NoSwap,
    468             nullptr, nullptr);
    469 
    470     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    471     mDescription.hasTextureTransform = true;
    472     return *this;
    473 }
    474 
    475 GlopBuilder& GlopBuilder::setGammaCorrection(bool enabled) {
    476     REQUIRE_STAGES(kFillStage);
    477 
    478     mDescription.hasGammaCorrection = enabled;
    479     return *this;
    480 }
    481 
    482 ////////////////////////////////////////////////////////////////////////////////
    483 // Transform
    484 ////////////////////////////////////////////////////////////////////////////////
    485 
    486 GlopBuilder& GlopBuilder::setTransform(const Matrix4& canvas, const int transformFlags) {
    487     TRIGGER_STAGE(kTransformStage);
    488 
    489     mOutGlop->transform.canvas = canvas;
    490     mOutGlop->transform.transformFlags = transformFlags;
    491     return *this;
    492 }
    493 
    494 ////////////////////////////////////////////////////////////////////////////////
    495 // ModelView
    496 ////////////////////////////////////////////////////////////////////////////////
    497 
    498 GlopBuilder& GlopBuilder::setModelViewMapUnitToRect(const Rect destination) {
    499     TRIGGER_STAGE(kModelViewStage);
    500 
    501     mOutGlop->transform.modelView.loadTranslate(destination.left, destination.top, 0.0f);
    502     mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
    503     return *this;
    504 }
    505 
    506 GlopBuilder& GlopBuilder::setModelViewMapUnitToRectSnap(const Rect destination) {
    507     TRIGGER_STAGE(kModelViewStage);
    508     REQUIRE_STAGES(kTransformStage | kFillStage);
    509 
    510     float left = destination.left;
    511     float top = destination.top;
    512 
    513     const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
    514     if (CC_LIKELY(meshTransform.isPureTranslate())) {
    515         // snap by adjusting the model view matrix
    516         const float translateX = meshTransform.getTranslateX();
    517         const float translateY = meshTransform.getTranslateY();
    518 
    519         left = (int) floorf(left + translateX + 0.5f) - translateX;
    520         top = (int) floorf(top + translateY + 0.5f) - translateY;
    521         mOutGlop->fill.texture.filter = GL_NEAREST;
    522     }
    523 
    524     mOutGlop->transform.modelView.loadTranslate(left, top, 0.0f);
    525     mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
    526     return *this;
    527 }
    528 
    529 GlopBuilder& GlopBuilder::setModelViewOffsetRect(float offsetX, float offsetY, const Rect source) {
    530     TRIGGER_STAGE(kModelViewStage);
    531 
    532     mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
    533     return *this;
    534 }
    535 
    536 GlopBuilder& GlopBuilder::setModelViewOffsetRectSnap(float offsetX, float offsetY, const Rect source) {
    537     TRIGGER_STAGE(kModelViewStage);
    538     REQUIRE_STAGES(kTransformStage | kFillStage);
    539 
    540     const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
    541     if (CC_LIKELY(meshTransform.isPureTranslate())) {
    542         // snap by adjusting the model view matrix
    543         const float translateX = meshTransform.getTranslateX();
    544         const float translateY = meshTransform.getTranslateY();
    545 
    546         offsetX = (int) floorf(offsetX + translateX + source.left + 0.5f) - translateX - source.left;
    547         offsetY = (int) floorf(offsetY + translateY + source.top + 0.5f) - translateY - source.top;
    548         mOutGlop->fill.texture.filter = GL_NEAREST;
    549     }
    550 
    551     mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
    552     return *this;
    553 }
    554 
    555 ////////////////////////////////////////////////////////////////////////////////
    556 // RoundRectClip
    557 ////////////////////////////////////////////////////////////////////////////////
    558 
    559 GlopBuilder& GlopBuilder::setRoundRectClipState(const RoundRectClipState* roundRectClipState) {
    560     TRIGGER_STAGE(kRoundRectClipStage);
    561 
    562     mOutGlop->roundRectClipState = roundRectClipState;
    563     mDescription.hasRoundRectClip = roundRectClipState != nullptr;
    564     return *this;
    565 }
    566 
    567 ////////////////////////////////////////////////////////////////////////////////
    568 // Build
    569 ////////////////////////////////////////////////////////////////////////////////
    570 
    571 void verify(const ProgramDescription& description, const Glop& glop) {
    572     if (glop.fill.texture.texture != nullptr) {
    573         LOG_ALWAYS_FATAL_IF(((description.hasTexture && description.hasExternalTexture)
    574                         || (!description.hasTexture
    575                                 && !description.hasExternalTexture
    576                                 && !description.useShadowAlphaInterp)
    577                         || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) == 0
    578                                 && !description.useShadowAlphaInterp)),
    579                 "Texture %p, hT%d, hET %d, attribFlags %x",
    580                 glop.fill.texture.texture,
    581                 description.hasTexture, description.hasExternalTexture,
    582                 glop.mesh.vertices.attribFlags);
    583     } else {
    584         LOG_ALWAYS_FATAL_IF((description.hasTexture
    585                         || description.hasExternalTexture
    586                         || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) != 0)),
    587                 "No texture, hT%d, hET %d, attribFlags %x",
    588                 description.hasTexture, description.hasExternalTexture,
    589                 glop.mesh.vertices.attribFlags);
    590     }
    591 
    592     if ((glop.mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
    593             && glop.mesh.vertices.bufferObject) {
    594         LOG_ALWAYS_FATAL("VBO and alpha attributes are not currently compatible");
    595     }
    596 
    597     if (description.hasTextureTransform != (glop.fill.texture.textureTransform != nullptr)) {
    598         LOG_ALWAYS_FATAL("Texture transform incorrectly specified");
    599     }
    600 }
    601 
    602 void GlopBuilder::build() {
    603     REQUIRE_STAGES(kAllStages);
    604     if (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) {
    605         Texture* texture = mOutGlop->fill.texture.texture;
    606         if (texture->target() == GL_TEXTURE_2D) {
    607             mDescription.hasTexture = true;
    608         } else {
    609             mDescription.hasExternalTexture = true;
    610         }
    611         mDescription.hasLinearTexture = texture->isLinear();
    612         mDescription.hasColorSpaceConversion = texture->hasColorSpaceConversion();
    613         mDescription.transferFunction = texture->getTransferFunctionType();
    614         mDescription.hasTranslucentConversion = texture->blend;
    615     }
    616 
    617     mDescription.hasColors = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Color;
    618     mDescription.hasVertexAlpha = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha;
    619 
    620     // Enable debug highlight when what we're about to draw is tested against
    621     // the stencil buffer and if stencil highlight debugging is on
    622     mDescription.hasDebugHighlight = !Properties::debugOverdraw
    623             && Properties::debugStencilClip == StencilClipDebug::ShowHighlight
    624             && mRenderState.stencil().isTestEnabled();
    625 
    626     // serialize shader info into ShaderData
    627     GLuint textureUnit = mOutGlop->fill.texture.texture ? 1 : 0;
    628 
    629     if (CC_LIKELY(!mShader)) {
    630         mOutGlop->fill.skiaShaderData.skiaShaderType = kNone_SkiaShaderType;
    631     } else {
    632         Matrix4 shaderMatrix;
    633         if (mOutGlop->transform.transformFlags & TransformFlags::MeshIgnoresCanvasTransform) {
    634             // canvas level transform was built into the modelView and geometry,
    635             // so the shader matrix must reverse this
    636             shaderMatrix.loadInverse(mOutGlop->transform.canvas);
    637             shaderMatrix.multiply(mOutGlop->transform.modelView);
    638         } else {
    639             shaderMatrix = mOutGlop->transform.modelView;
    640         }
    641         SkiaShader::store(mCaches, *mShader, shaderMatrix,
    642                 &textureUnit, &mDescription, &(mOutGlop->fill.skiaShaderData));
    643     }
    644 
    645     // duplicates ProgramCache's definition of color uniform presence
    646     const bool singleColor = !mDescription.hasTexture
    647             && !mDescription.hasExternalTexture
    648             && !mDescription.hasGradient
    649             && !mDescription.hasBitmap;
    650     mOutGlop->fill.colorEnabled = mDescription.modulate || singleColor;
    651 
    652     verify(mDescription, *mOutGlop);
    653 
    654     // Final step: populate program and map bounds into render target space
    655     mOutGlop->fill.program = mCaches.programCache.get(mDescription);
    656 }
    657 
    658 void GlopBuilder::dump(const Glop& glop) {
    659     ALOGD("Glop Mesh");
    660     const Glop::Mesh& mesh = glop.mesh;
    661     ALOGD("    primitive mode: %d", mesh.primitiveMode);
    662     ALOGD("    indices: buffer obj %x, indices %p", mesh.indices.bufferObject, mesh.indices.indices);
    663 
    664     const Glop::Mesh::Vertices& vertices = glop.mesh.vertices;
    665     ALOGD("    vertices: buffer obj %x, flags %x, pos %p, tex %p, clr %p, stride %d",
    666             vertices.bufferObject, vertices.attribFlags,
    667             vertices.position, vertices.texCoord, vertices.color, vertices.stride);
    668     ALOGD("    element count: %d", mesh.elementCount);
    669 
    670     ALOGD("Glop Fill");
    671     const Glop::Fill& fill = glop.fill;
    672     ALOGD("    program %p", fill.program);
    673     if (fill.texture.texture) {
    674         ALOGD("    texture %p, target %d, filter %d, clamp %d",
    675                 fill.texture.texture, fill.texture.texture->target(),
    676                 fill.texture.filter, fill.texture.clamp);
    677         if (fill.texture.textureTransform) {
    678             fill.texture.textureTransform->dump("texture transform");
    679         }
    680     }
    681     ALOGD_IF(fill.colorEnabled, "    color (argb) %.2f %.2f %.2f %.2f",
    682             fill.color.a, fill.color.r, fill.color.g, fill.color.b);
    683     ALOGD_IF(fill.filterMode != ProgramDescription::ColorFilterMode::None,
    684             "    filterMode %d", (int)fill.filterMode);
    685     ALOGD_IF(fill.skiaShaderData.skiaShaderType, "    shader type %d",
    686             fill.skiaShaderData.skiaShaderType);
    687 
    688     ALOGD("Glop transform");
    689     glop.transform.modelView.dump("  model view");
    690     glop.transform.canvas.dump("  canvas");
    691     ALOGD_IF(glop.transform.transformFlags, "  transformFlags 0x%x", glop.transform.transformFlags);
    692 
    693     ALOGD_IF(glop.roundRectClipState, "Glop RRCS %p", glop.roundRectClipState);
    694 
    695     ALOGD("Glop blend %d %d", glop.blend.src, glop.blend.dst);
    696 }
    697 
    698 } /* namespace uirenderer */
    699 } /* namespace android */
    700