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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 "Glop.h"
     20 #include "Matrix.h"
     21 #include "Patch.h"
     22 #include "renderstate/MeshState.h"
     23 #include "renderstate/RenderState.h"
     24 #include "SkiaShader.h"
     25 #include "Texture.h"
     26 #include "utils/PaintUtils.h"
     27 #include "VertexBuffer.h"
     28 
     29 #include <GLES2/gl2.h>
     30 #include <SkPaint.h>
     31 
     32 #define DEBUG_GLOP_BUILDER 0
     33 
     34 #if DEBUG_GLOP_BUILDER
     35 
     36 #define TRIGGER_STAGE(stageFlag) \
     37     LOG_ALWAYS_FATAL_IF((stageFlag) & mStageFlags, "Stage %d cannot be run twice", (stageFlag)); \
     38     mStageFlags = static_cast<StageFlags>(mStageFlags | (stageFlag))
     39 
     40 #define REQUIRE_STAGES(requiredFlags) \
     41     LOG_ALWAYS_FATAL_IF((mStageFlags & (requiredFlags)) != (requiredFlags), \
     42             "not prepared for current stage")
     43 
     44 #else
     45 
     46 #define TRIGGER_STAGE(stageFlag) ((void)0)
     47 #define REQUIRE_STAGES(requiredFlags) ((void)0)
     48 
     49 #endif
     50 
     51 namespace android {
     52 namespace uirenderer {
     53 
     54 static void setUnitQuadTextureCoords(Rect uvs, TextureVertex* quadVertex) {
     55     quadVertex[0] = {0, 0, uvs.left, uvs.top};
     56     quadVertex[1] = {1, 0, uvs.right, uvs.top};
     57     quadVertex[2] = {0, 1, uvs.left, uvs.bottom};
     58     quadVertex[3] = {1, 1, uvs.right, uvs.bottom};
     59 }
     60 
     61 GlopBuilder::GlopBuilder(RenderState& renderState, Caches& caches, Glop* outGlop)
     62         : mRenderState(renderState)
     63         , mCaches(caches)
     64         , mShader(nullptr)
     65         , mOutGlop(outGlop) {
     66     mStageFlags = kInitialStage;
     67 }
     68 
     69 ////////////////////////////////////////////////////////////////////////////////
     70 // Mesh
     71 ////////////////////////////////////////////////////////////////////////////////
     72 
     73 GlopBuilder& GlopBuilder::setMeshTexturedIndexedVbo(GLuint vbo, GLsizei elementCount) {
     74     TRIGGER_STAGE(kMeshStage);
     75 
     76     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
     77     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
     78     mOutGlop->mesh.vertices = {
     79             vbo,
     80             VertexAttribFlags::TextureCoord,
     81             nullptr, (const void*) kMeshTextureOffset, nullptr,
     82             kTextureVertexStride };
     83     mOutGlop->mesh.elementCount = elementCount;
     84     return *this;
     85 }
     86 
     87 GlopBuilder& GlopBuilder::setMeshUnitQuad() {
     88     TRIGGER_STAGE(kMeshStage);
     89 
     90     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
     91     mOutGlop->mesh.indices = { 0, nullptr };
     92     mOutGlop->mesh.vertices = {
     93             mRenderState.meshState().getUnitQuadVBO(),
     94             VertexAttribFlags::None,
     95             nullptr, nullptr, nullptr,
     96             kTextureVertexStride };
     97     mOutGlop->mesh.elementCount = 4;
     98     return *this;
     99 }
    100 
    101 GlopBuilder& GlopBuilder::setMeshTexturedUnitQuad(const UvMapper* uvMapper) {
    102     if (uvMapper) {
    103         // can't use unit quad VBO, so build UV vertices manually
    104         return setMeshTexturedUvQuad(uvMapper, Rect(1, 1));
    105     }
    106 
    107     TRIGGER_STAGE(kMeshStage);
    108 
    109     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
    110     mOutGlop->mesh.indices = { 0, nullptr };
    111     mOutGlop->mesh.vertices = {
    112             mRenderState.meshState().getUnitQuadVBO(),
    113             VertexAttribFlags::TextureCoord,
    114             nullptr, (const void*) kMeshTextureOffset, nullptr,
    115             kTextureVertexStride };
    116     mOutGlop->mesh.elementCount = 4;
    117     return *this;
    118 }
    119 
    120 GlopBuilder& GlopBuilder::setMeshTexturedUvQuad(const UvMapper* uvMapper, Rect uvs) {
    121     TRIGGER_STAGE(kMeshStage);
    122 
    123     if (CC_UNLIKELY(uvMapper)) {
    124         uvMapper->map(uvs);
    125     }
    126     setUnitQuadTextureCoords(uvs, &mOutGlop->mesh.mappedVertices[0]);
    127 
    128     const TextureVertex* textureVertex = mOutGlop->mesh.mappedVertices;
    129     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
    130     mOutGlop->mesh.indices = { 0, nullptr };
    131     mOutGlop->mesh.vertices = {
    132             0,
    133             VertexAttribFlags::TextureCoord,
    134             &textureVertex[0].x, &textureVertex[0].u, nullptr,
    135             kTextureVertexStride };
    136     mOutGlop->mesh.elementCount = 4;
    137     return *this;
    138 }
    139 
    140 GlopBuilder& GlopBuilder::setMeshIndexedQuads(Vertex* vertexData, int quadCount) {
    141     TRIGGER_STAGE(kMeshStage);
    142 
    143     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    144     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
    145     mOutGlop->mesh.vertices = {
    146             0,
    147             VertexAttribFlags::None,
    148             vertexData, nullptr, nullptr,
    149             kVertexStride };
    150     mOutGlop->mesh.elementCount = 6 * quadCount;
    151     return *this;
    152 }
    153 
    154 GlopBuilder& GlopBuilder::setMeshTexturedIndexedQuads(TextureVertex* vertexData, int elementCount) {
    155     TRIGGER_STAGE(kMeshStage);
    156 
    157     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    158     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
    159     mOutGlop->mesh.vertices = {
    160             0,
    161             VertexAttribFlags::TextureCoord,
    162             &vertexData[0].x, &vertexData[0].u, nullptr,
    163             kTextureVertexStride };
    164     mOutGlop->mesh.elementCount = elementCount;
    165     return *this;
    166 }
    167 
    168 GlopBuilder& GlopBuilder::setMeshTexturedMesh(TextureVertex* vertexData, int elementCount) {
    169     TRIGGER_STAGE(kMeshStage);
    170 
    171     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    172     mOutGlop->mesh.indices = { 0, nullptr };
    173     mOutGlop->mesh.vertices = {
    174             0,
    175             VertexAttribFlags::TextureCoord,
    176             &vertexData[0].x, &vertexData[0].u, nullptr,
    177             kTextureVertexStride };
    178     mOutGlop->mesh.elementCount = elementCount;
    179     return *this;
    180 }
    181 
    182 GlopBuilder& GlopBuilder::setMeshColoredTexturedMesh(ColorTextureVertex* vertexData, int elementCount) {
    183     TRIGGER_STAGE(kMeshStage);
    184 
    185     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    186     mOutGlop->mesh.indices = { 0, nullptr };
    187     mOutGlop->mesh.vertices = {
    188             0,
    189             VertexAttribFlags::TextureCoord | VertexAttribFlags::Color,
    190             &vertexData[0].x, &vertexData[0].u, &vertexData[0].r,
    191             kColorTextureVertexStride };
    192     mOutGlop->mesh.elementCount = elementCount;
    193     return *this;
    194 }
    195 
    196 GlopBuilder& GlopBuilder::setMeshVertexBuffer(const VertexBuffer& vertexBuffer) {
    197     TRIGGER_STAGE(kMeshStage);
    198 
    199     const VertexBuffer::MeshFeatureFlags flags = vertexBuffer.getMeshFeatureFlags();
    200 
    201     bool alphaVertex = flags & VertexBuffer::kAlpha;
    202     bool indices = flags & VertexBuffer::kIndices;
    203 
    204     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
    205     mOutGlop->mesh.indices = { 0, vertexBuffer.getIndices() };
    206     mOutGlop->mesh.vertices = {
    207             0,
    208             alphaVertex ? VertexAttribFlags::Alpha : VertexAttribFlags::None,
    209             vertexBuffer.getBuffer(), nullptr, nullptr,
    210             alphaVertex ? kAlphaVertexStride : kVertexStride };
    211     mOutGlop->mesh.elementCount = indices
    212                 ? vertexBuffer.getIndexCount() : vertexBuffer.getVertexCount();
    213     return *this;
    214 }
    215 
    216 GlopBuilder& GlopBuilder::setMeshPatchQuads(const Patch& patch) {
    217     TRIGGER_STAGE(kMeshStage);
    218 
    219     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
    220     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
    221     mOutGlop->mesh.vertices = {
    222             mCaches.patchCache.getMeshBuffer(),
    223             VertexAttribFlags::TextureCoord,
    224             (void*)patch.positionOffset, (void*)patch.textureOffset, nullptr,
    225             kTextureVertexStride };
    226     mOutGlop->mesh.elementCount = patch.indexCount;
    227     return *this;
    228 }
    229 
    230 ////////////////////////////////////////////////////////////////////////////////
    231 // Fill
    232 ////////////////////////////////////////////////////////////////////////////////
    233 
    234 void GlopBuilder::setFill(int color, float alphaScale,
    235         SkXfermode::Mode mode, Blend::ModeOrderSwap modeUsage,
    236         const SkShader* shader, const SkColorFilter* colorFilter) {
    237     if (mode != SkXfermode::kClear_Mode) {
    238         float alpha = (SkColorGetA(color) / 255.0f) * alphaScale;
    239         if (!shader) {
    240             float colorScale = alpha / 255.0f;
    241             mOutGlop->fill.color = {
    242                     colorScale * SkColorGetR(color),
    243                     colorScale * SkColorGetG(color),
    244                     colorScale * SkColorGetB(color),
    245                     alpha
    246             };
    247         } else {
    248             mOutGlop->fill.color = { 1, 1, 1, alpha };
    249         }
    250     } else {
    251         mOutGlop->fill.color = { 0, 0, 0, 1 };
    252     }
    253 
    254     mOutGlop->blend = { GL_ZERO, GL_ZERO };
    255     if (mOutGlop->fill.color.a < 1.0f
    256             || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
    257             || (mOutGlop->fill.texture.texture && mOutGlop->fill.texture.texture->blend)
    258             || mOutGlop->roundRectClipState
    259             || PaintUtils::isBlendedShader(shader)
    260             || PaintUtils::isBlendedColorFilter(colorFilter)
    261             || mode != SkXfermode::kSrcOver_Mode) {
    262         if (CC_LIKELY(mode <= SkXfermode::kScreen_Mode)) {
    263             Blend::getFactors(mode, modeUsage,
    264                     &mOutGlop->blend.src, &mOutGlop->blend.dst);
    265         } else {
    266             // These blend modes are not supported by OpenGL directly and have
    267             // to be implemented using shaders. Since the shader will perform
    268             // the blending, don't enable GL blending off here
    269             // If the blend mode cannot be implemented using shaders, fall
    270             // back to the default SrcOver blend mode instead
    271             if (CC_UNLIKELY(mCaches.extensions().hasFramebufferFetch())) {
    272                 mDescription.framebufferMode = mode;
    273                 mDescription.swapSrcDst = (modeUsage == Blend::ModeOrderSwap::Swap);
    274                 // blending in shader, don't enable
    275             } else {
    276                 // unsupported
    277                 Blend::getFactors(SkXfermode::kSrcOver_Mode, modeUsage,
    278                         &mOutGlop->blend.src, &mOutGlop->blend.dst);
    279             }
    280         }
    281     }
    282     mShader = shader; // shader resolved in ::build()
    283 
    284     if (colorFilter) {
    285         SkColor color;
    286         SkXfermode::Mode mode;
    287         SkScalar srcColorMatrix[20];
    288         if (colorFilter->asColorMode(&color, &mode)) {
    289             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::ColorFilterMode::Blend;
    290             mDescription.colorMode = mode;
    291 
    292             const float alpha = SkColorGetA(color) / 255.0f;
    293             float colorScale = alpha / 255.0f;
    294             mOutGlop->fill.filter.color = {
    295                     colorScale * SkColorGetR(color),
    296                     colorScale * SkColorGetG(color),
    297                     colorScale * SkColorGetB(color),
    298                     alpha,
    299             };
    300         } else if (colorFilter->asColorMatrix(srcColorMatrix)) {
    301             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::ColorFilterMode::Matrix;
    302 
    303             float* colorMatrix = mOutGlop->fill.filter.matrix.matrix;
    304             memcpy(colorMatrix, srcColorMatrix, 4 * sizeof(float));
    305             memcpy(&colorMatrix[4], &srcColorMatrix[5], 4 * sizeof(float));
    306             memcpy(&colorMatrix[8], &srcColorMatrix[10], 4 * sizeof(float));
    307             memcpy(&colorMatrix[12], &srcColorMatrix[15], 4 * sizeof(float));
    308 
    309             // Skia uses the range [0..255] for the addition vector, but we need
    310             // the [0..1] range to apply the vector in GLSL
    311             float* colorVector = mOutGlop->fill.filter.matrix.vector;
    312             colorVector[0] = srcColorMatrix[4] / 255.0f;
    313             colorVector[1] = srcColorMatrix[9] / 255.0f;
    314             colorVector[2] = srcColorMatrix[14] / 255.0f;
    315             colorVector[3] = srcColorMatrix[19] / 255.0f;
    316         } else {
    317             LOG_ALWAYS_FATAL("unsupported ColorFilter");
    318         }
    319     } else {
    320         mOutGlop->fill.filterMode = ProgramDescription::ColorFilterMode::None;
    321     }
    322 }
    323 
    324 GlopBuilder& GlopBuilder::setFillTexturePaint(Texture& texture,
    325         const int textureFillFlags, const SkPaint* paint, float alphaScale) {
    326     TRIGGER_STAGE(kFillStage);
    327     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    328 
    329     GLenum filter = (textureFillFlags & TextureFillFlags::ForceFilter)
    330             ? GL_LINEAR : PaintUtils::getFilter(paint);
    331     mOutGlop->fill.texture = { &texture,
    332             GL_TEXTURE_2D, filter, GL_CLAMP_TO_EDGE, nullptr };
    333 
    334     if (paint) {
    335         int color = paint->getColor();
    336         SkShader* shader = paint->getShader();
    337 
    338         if (!(textureFillFlags & TextureFillFlags::IsAlphaMaskTexture)) {
    339             // Texture defines color, so disable shaders, and reset all non-alpha color channels
    340             color |= 0x00FFFFFF;
    341             shader = nullptr;
    342         }
    343         setFill(color, alphaScale,
    344                 PaintUtils::getXfermode(paint->getXfermode()), Blend::ModeOrderSwap::NoSwap,
    345                 shader, paint->getColorFilter());
    346     } else {
    347         mOutGlop->fill.color = { alphaScale, alphaScale, alphaScale, alphaScale };
    348 
    349         if (alphaScale < 1.0f
    350                 || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
    351                 || texture.blend
    352                 || mOutGlop->roundRectClipState) {
    353             Blend::getFactors(SkXfermode::kSrcOver_Mode, Blend::ModeOrderSwap::NoSwap,
    354                     &mOutGlop->blend.src, &mOutGlop->blend.dst);
    355         } else {
    356             mOutGlop->blend = { GL_ZERO, GL_ZERO };
    357         }
    358     }
    359 
    360     if (textureFillFlags & TextureFillFlags::IsAlphaMaskTexture) {
    361         mDescription.modulate = mOutGlop->fill.color.isNotBlack();
    362         mDescription.hasAlpha8Texture = true;
    363     } else {
    364         mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    365     }
    366     return *this;
    367 }
    368 
    369 GlopBuilder& GlopBuilder::setFillPaint(const SkPaint& paint, float alphaScale, bool shadowInterp) {
    370     TRIGGER_STAGE(kFillStage);
    371     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    372 
    373     if (CC_LIKELY(!shadowInterp)) {
    374         mOutGlop->fill.texture = {
    375                 nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    376     } else {
    377         mOutGlop->fill.texture = {
    378                 mCaches.textureState().getShadowLutTexture(), GL_TEXTURE_2D,
    379                 GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    380     }
    381 
    382     setFill(paint.getColor(), alphaScale,
    383             PaintUtils::getXfermode(paint.getXfermode()), Blend::ModeOrderSwap::NoSwap,
    384             paint.getShader(), paint.getColorFilter());
    385     mDescription.useShadowAlphaInterp = shadowInterp;
    386     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    387     return *this;
    388 }
    389 
    390 GlopBuilder& GlopBuilder::setFillPathTexturePaint(PathTexture& texture,
    391         const SkPaint& paint, float alphaScale) {
    392     TRIGGER_STAGE(kFillStage);
    393     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    394 
    395     //specify invalid filter/clamp, since these are always static for PathTextures
    396     mOutGlop->fill.texture = { &texture, GL_TEXTURE_2D, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    397 
    398     setFill(paint.getColor(), alphaScale,
    399             PaintUtils::getXfermode(paint.getXfermode()), Blend::ModeOrderSwap::NoSwap,
    400             paint.getShader(), paint.getColorFilter());
    401 
    402     mDescription.hasAlpha8Texture = true;
    403     mDescription.modulate = mOutGlop->fill.color.isNotBlack();
    404     return *this;
    405 }
    406 
    407 GlopBuilder& GlopBuilder::setFillShadowTexturePaint(ShadowTexture& texture, int shadowColor,
    408         const SkPaint& paint, float alphaScale) {
    409     TRIGGER_STAGE(kFillStage);
    410     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    411 
    412     //specify invalid filter/clamp, since these are always static for ShadowTextures
    413     mOutGlop->fill.texture = { &texture, GL_TEXTURE_2D, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    414 
    415     const int ALPHA_BITMASK = SK_ColorBLACK;
    416     const int COLOR_BITMASK = ~ALPHA_BITMASK;
    417     if ((shadowColor & ALPHA_BITMASK) == ALPHA_BITMASK) {
    418         // shadow color is fully opaque: override its alpha with that of paint
    419         shadowColor &= paint.getColor() | COLOR_BITMASK;
    420     }
    421 
    422     setFill(shadowColor, alphaScale,
    423             PaintUtils::getXfermode(paint.getXfermode()), Blend::ModeOrderSwap::NoSwap,
    424             paint.getShader(), paint.getColorFilter());
    425 
    426     mDescription.hasAlpha8Texture = true;
    427     mDescription.modulate = mOutGlop->fill.color.isNotBlack();
    428     return *this;
    429 }
    430 
    431 GlopBuilder& GlopBuilder::setFillBlack() {
    432     TRIGGER_STAGE(kFillStage);
    433     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    434 
    435     mOutGlop->fill.texture = { nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    436     setFill(SK_ColorBLACK, 1.0f, SkXfermode::kSrcOver_Mode, Blend::ModeOrderSwap::NoSwap,
    437             nullptr, nullptr);
    438     return *this;
    439 }
    440 
    441 GlopBuilder& GlopBuilder::setFillClear() {
    442     TRIGGER_STAGE(kFillStage);
    443     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    444 
    445     mOutGlop->fill.texture = { nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
    446     setFill(SK_ColorBLACK, 1.0f, SkXfermode::kClear_Mode, Blend::ModeOrderSwap::NoSwap,
    447             nullptr, nullptr);
    448     return *this;
    449 }
    450 
    451 GlopBuilder& GlopBuilder::setFillLayer(Texture& texture, const SkColorFilter* colorFilter,
    452         float alpha, SkXfermode::Mode mode, Blend::ModeOrderSwap modeUsage) {
    453     TRIGGER_STAGE(kFillStage);
    454     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    455 
    456     mOutGlop->fill.texture = { &texture,
    457             GL_TEXTURE_2D, GL_LINEAR, GL_CLAMP_TO_EDGE, nullptr };
    458 
    459     setFill(SK_ColorWHITE, alpha, mode, modeUsage, nullptr, colorFilter);
    460 
    461     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    462     return *this;
    463 }
    464 
    465 GlopBuilder& GlopBuilder::setFillTextureLayer(Layer& layer, float alpha) {
    466     TRIGGER_STAGE(kFillStage);
    467     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    468 
    469     mOutGlop->fill.texture = { &(layer.getTexture()),
    470             layer.getRenderTarget(), GL_LINEAR, GL_CLAMP_TO_EDGE, &layer.getTexTransform() };
    471 
    472     setFill(SK_ColorWHITE, alpha, layer.getMode(), Blend::ModeOrderSwap::NoSwap,
    473             nullptr, layer.getColorFilter());
    474 
    475     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    476     mDescription.hasTextureTransform = true;
    477     return *this;
    478 }
    479 
    480 GlopBuilder& GlopBuilder::setFillExternalTexture(Texture& texture, Matrix4& textureTransform) {
    481     TRIGGER_STAGE(kFillStage);
    482     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
    483 
    484     mOutGlop->fill.texture = { &texture,
    485             GL_TEXTURE_EXTERNAL_OES, GL_LINEAR, GL_CLAMP_TO_EDGE,
    486             &textureTransform };
    487 
    488     setFill(SK_ColorWHITE, 1.0f, SkXfermode::kSrc_Mode, Blend::ModeOrderSwap::NoSwap,
    489             nullptr, nullptr);
    490 
    491     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
    492     mDescription.hasTextureTransform = true;
    493     return *this;
    494 }
    495 
    496 ////////////////////////////////////////////////////////////////////////////////
    497 // Transform
    498 ////////////////////////////////////////////////////////////////////////////////
    499 
    500 GlopBuilder& GlopBuilder::setTransform(const Matrix4& canvas, const int transformFlags) {
    501     TRIGGER_STAGE(kTransformStage);
    502 
    503     mOutGlop->transform.canvas = canvas;
    504     mOutGlop->transform.transformFlags = transformFlags;
    505     return *this;
    506 }
    507 
    508 ////////////////////////////////////////////////////////////////////////////////
    509 // ModelView
    510 ////////////////////////////////////////////////////////////////////////////////
    511 
    512 GlopBuilder& GlopBuilder::setModelViewMapUnitToRect(const Rect destination) {
    513     TRIGGER_STAGE(kModelViewStage);
    514 
    515     mOutGlop->transform.modelView.loadTranslate(destination.left, destination.top, 0.0f);
    516     mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
    517 #if !HWUI_NEW_OPS
    518     mOutGlop->bounds = destination;
    519 #endif
    520     return *this;
    521 }
    522 
    523 GlopBuilder& GlopBuilder::setModelViewMapUnitToRectSnap(const Rect destination) {
    524     TRIGGER_STAGE(kModelViewStage);
    525     REQUIRE_STAGES(kTransformStage | kFillStage);
    526 
    527     float left = destination.left;
    528     float top = destination.top;
    529 
    530     const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
    531     if (CC_LIKELY(meshTransform.isPureTranslate())) {
    532         // snap by adjusting the model view matrix
    533         const float translateX = meshTransform.getTranslateX();
    534         const float translateY = meshTransform.getTranslateY();
    535 
    536         left = (int) floorf(left + translateX + 0.5f) - translateX;
    537         top = (int) floorf(top + translateY + 0.5f) - translateY;
    538         mOutGlop->fill.texture.filter = GL_NEAREST;
    539     }
    540 
    541     mOutGlop->transform.modelView.loadTranslate(left, top, 0.0f);
    542     mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
    543 #if !HWUI_NEW_OPS
    544     mOutGlop->bounds = destination;
    545 #endif
    546     return *this;
    547 }
    548 
    549 GlopBuilder& GlopBuilder::setModelViewOffsetRect(float offsetX, float offsetY, const Rect source) {
    550     TRIGGER_STAGE(kModelViewStage);
    551 
    552     mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
    553 #if !HWUI_NEW_OPS
    554     mOutGlop->bounds = source;
    555     mOutGlop->bounds.translate(offsetX, offsetY);
    556 #endif
    557     return *this;
    558 }
    559 
    560 GlopBuilder& GlopBuilder::setModelViewOffsetRectSnap(float offsetX, float offsetY, const Rect source) {
    561     TRIGGER_STAGE(kModelViewStage);
    562     REQUIRE_STAGES(kTransformStage | kFillStage);
    563 
    564     const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
    565     if (CC_LIKELY(meshTransform.isPureTranslate())) {
    566         // snap by adjusting the model view matrix
    567         const float translateX = meshTransform.getTranslateX();
    568         const float translateY = meshTransform.getTranslateY();
    569 
    570         offsetX = (int) floorf(offsetX + translateX + source.left + 0.5f) - translateX - source.left;
    571         offsetY = (int) floorf(offsetY + translateY + source.top + 0.5f) - translateY - source.top;
    572         mOutGlop->fill.texture.filter = GL_NEAREST;
    573     }
    574 
    575     mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
    576 #if !HWUI_NEW_OPS
    577     mOutGlop->bounds = source;
    578     mOutGlop->bounds.translate(offsetX, offsetY);
    579 #endif
    580     return *this;
    581 }
    582 
    583 ////////////////////////////////////////////////////////////////////////////////
    584 // RoundRectClip
    585 ////////////////////////////////////////////////////////////////////////////////
    586 
    587 GlopBuilder& GlopBuilder::setRoundRectClipState(const RoundRectClipState* roundRectClipState) {
    588     TRIGGER_STAGE(kRoundRectClipStage);
    589 
    590     mOutGlop->roundRectClipState = roundRectClipState;
    591     mDescription.hasRoundRectClip = roundRectClipState != nullptr;
    592     return *this;
    593 }
    594 
    595 ////////////////////////////////////////////////////////////////////////////////
    596 // Build
    597 ////////////////////////////////////////////////////////////////////////////////
    598 
    599 void verify(const ProgramDescription& description, const Glop& glop) {
    600     if (glop.fill.texture.texture != nullptr) {
    601         LOG_ALWAYS_FATAL_IF(((description.hasTexture && description.hasExternalTexture)
    602                         || (!description.hasTexture
    603                                 && !description.hasExternalTexture
    604                                 && !description.useShadowAlphaInterp)
    605                         || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) == 0
    606                                 && !description.useShadowAlphaInterp)),
    607                 "Texture %p, hT%d, hET %d, attribFlags %x",
    608                 glop.fill.texture.texture,
    609                 description.hasTexture, description.hasExternalTexture,
    610                 glop.mesh.vertices.attribFlags);
    611     } else {
    612         LOG_ALWAYS_FATAL_IF((description.hasTexture
    613                         || description.hasExternalTexture
    614                         || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) != 0)),
    615                 "No texture, hT%d, hET %d, attribFlags %x",
    616                 description.hasTexture, description.hasExternalTexture,
    617                 glop.mesh.vertices.attribFlags);
    618     }
    619 
    620     if ((glop.mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
    621             && glop.mesh.vertices.bufferObject) {
    622         LOG_ALWAYS_FATAL("VBO and alpha attributes are not currently compatible");
    623     }
    624 
    625     if (description.hasTextureTransform != (glop.fill.texture.textureTransform != nullptr)) {
    626         LOG_ALWAYS_FATAL("Texture transform incorrectly specified");
    627     }
    628 }
    629 
    630 void GlopBuilder::build() {
    631     REQUIRE_STAGES(kAllStages);
    632     if (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) {
    633         if (mOutGlop->fill.texture.target == GL_TEXTURE_2D) {
    634             mDescription.hasTexture = true;
    635         } else {
    636             mDescription.hasExternalTexture = true;
    637         }
    638     }
    639 
    640     mDescription.hasColors = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Color;
    641     mDescription.hasVertexAlpha = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha;
    642 
    643     // Enable debug highlight when what we're about to draw is tested against
    644     // the stencil buffer and if stencil highlight debugging is on
    645     mDescription.hasDebugHighlight = !Properties::debugOverdraw
    646             && Properties::debugStencilClip == StencilClipDebug::ShowHighlight
    647             && mRenderState.stencil().isTestEnabled();
    648 
    649     // serialize shader info into ShaderData
    650     GLuint textureUnit = mOutGlop->fill.texture.texture ? 1 : 0;
    651 
    652     if (CC_LIKELY(!mShader)) {
    653         mOutGlop->fill.skiaShaderData.skiaShaderType = kNone_SkiaShaderType;
    654     } else {
    655         Matrix4 shaderMatrix;
    656         if (mOutGlop->transform.transformFlags & TransformFlags::MeshIgnoresCanvasTransform) {
    657             // canvas level transform was built into the modelView and geometry,
    658             // so the shader matrix must reverse this
    659             shaderMatrix.loadInverse(mOutGlop->transform.canvas);
    660             shaderMatrix.multiply(mOutGlop->transform.modelView);
    661         } else {
    662             shaderMatrix = mOutGlop->transform.modelView;
    663         }
    664         SkiaShader::store(mCaches, *mShader, shaderMatrix,
    665                 &textureUnit, &mDescription, &(mOutGlop->fill.skiaShaderData));
    666     }
    667 
    668     // duplicates ProgramCache's definition of color uniform presence
    669     const bool singleColor = !mDescription.hasTexture
    670             && !mDescription.hasExternalTexture
    671             && !mDescription.hasGradient
    672             && !mDescription.hasBitmap;
    673     mOutGlop->fill.colorEnabled = mDescription.modulate || singleColor;
    674 
    675     verify(mDescription, *mOutGlop);
    676 
    677     // Final step: populate program and map bounds into render target space
    678     mOutGlop->fill.program = mCaches.programCache.get(mDescription);
    679 #if !HWUI_NEW_OPS
    680     mOutGlop->transform.meshTransform().mapRect(mOutGlop->bounds);
    681 #endif
    682 }
    683 
    684 void GlopBuilder::dump(const Glop& glop) {
    685     ALOGD("Glop Mesh");
    686     const Glop::Mesh& mesh = glop.mesh;
    687     ALOGD("    primitive mode: %d", mesh.primitiveMode);
    688     ALOGD("    indices: buffer obj %x, indices %p", mesh.indices.bufferObject, mesh.indices.indices);
    689 
    690     const Glop::Mesh::Vertices& vertices = glop.mesh.vertices;
    691     ALOGD("    vertices: buffer obj %x, flags %x, pos %p, tex %p, clr %p, stride %d",
    692             vertices.bufferObject, vertices.attribFlags,
    693             vertices.position, vertices.texCoord, vertices.color, vertices.stride);
    694     ALOGD("    element count: %d", mesh.elementCount);
    695 
    696     ALOGD("Glop Fill");
    697     const Glop::Fill& fill = glop.fill;
    698     ALOGD("    program %p", fill.program);
    699     if (fill.texture.texture) {
    700         ALOGD("    texture %p, target %d, filter %d, clamp %d",
    701                 fill.texture.texture, fill.texture.target, fill.texture.filter, fill.texture.clamp);
    702         if (fill.texture.textureTransform) {
    703             fill.texture.textureTransform->dump("texture transform");
    704         }
    705     }
    706     ALOGD_IF(fill.colorEnabled, "    color (argb) %.2f %.2f %.2f %.2f",
    707             fill.color.a, fill.color.r, fill.color.g, fill.color.b);
    708     ALOGD_IF(fill.filterMode != ProgramDescription::ColorFilterMode::None,
    709             "    filterMode %d", (int)fill.filterMode);
    710     ALOGD_IF(fill.skiaShaderData.skiaShaderType, "    shader type %d",
    711             fill.skiaShaderData.skiaShaderType);
    712 
    713     ALOGD("Glop transform");
    714     glop.transform.modelView.dump("  model view");
    715     glop.transform.canvas.dump("  canvas");
    716     ALOGD_IF(glop.transform.transformFlags, "  transformFlags 0x%x", glop.transform.transformFlags);
    717 
    718     ALOGD_IF(glop.roundRectClipState, "Glop RRCS %p", glop.roundRectClipState);
    719 
    720     ALOGD("Glop blend %d %d", glop.blend.src, glop.blend.dst);
    721 #if !HWUI_NEW_OPS
    722     ALOGD("Glop bounds " RECT_STRING, RECT_ARGS(glop.bounds));
    723 #endif
    724 }
    725 
    726 } /* namespace uirenderer */
    727 } /* namespace android */
    728