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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 
     17 #pragma once
     18 
     19 #include "Glop.h"
     20 #include "Program.h"
     21 #include "renderstate/Blend.h"
     22 #include "utils/Macros.h"
     23 
     24 class SkPaint;
     25 class SkShader;
     26 
     27 namespace android {
     28 namespace uirenderer {
     29 
     30 class Caches;
     31 class GlLayer;
     32 class Matrix4;
     33 class Patch;
     34 class RenderState;
     35 class Texture;
     36 class UvMapper;
     37 class VertexBuffer;
     38 struct PathTexture;
     39 struct ShadowTexture;
     40 
     41 namespace TextureFillFlags {
     42     enum {
     43         None = 0,
     44         IsAlphaMaskTexture = 1 << 0,
     45         ForceFilter = 1 << 1,
     46     };
     47 }
     48 
     49 class GlopBuilder {
     50     PREVENT_COPY_AND_ASSIGN(GlopBuilder);
     51 public:
     52     GlopBuilder(RenderState& renderState, Caches& caches, Glop* outGlop);
     53 
     54     GlopBuilder& setMeshTexturedIndexedVbo(GLuint vbo, GLsizei elementCount);
     55     GlopBuilder& setMeshUnitQuad();
     56     GlopBuilder& setMeshTexturedUnitQuad(const UvMapper* uvMapper);
     57     GlopBuilder& setMeshTexturedUvQuad(const UvMapper* uvMapper, const Rect uvs);
     58     GlopBuilder& setMeshVertexBuffer(const VertexBuffer& vertexBuffer);
     59     GlopBuilder& setMeshIndexedQuads(Vertex* vertexData, int quadCount);
     60     GlopBuilder& setMeshColoredTexturedMesh(ColorTextureVertex* vertexData, int elementCount); // TODO: use indexed quads
     61     GlopBuilder& setMeshTexturedIndexedQuads(TextureVertex* vertexData, int elementCount); // TODO: take quadCount
     62     GlopBuilder& setMeshPatchQuads(const Patch& patch);
     63 
     64     GlopBuilder& setFillPaint(const SkPaint& paint, float alphaScale, bool shadowInterp = false); // TODO: avoid boolean with default
     65     GlopBuilder& setFillTexturePaint(Texture& texture, const int textureFillFlags,
     66             const SkPaint* paint, float alphaScale);
     67     GlopBuilder& setFillPathTexturePaint(PathTexture& texture,
     68             const SkPaint& paint, float alphaScale);
     69     GlopBuilder& setFillShadowTexturePaint(ShadowTexture& texture, int shadowColor,
     70             const SkPaint& paint, float alphaScale);
     71     GlopBuilder& setFillBlack();
     72     GlopBuilder& setFillClear();
     73     GlopBuilder& setFillLayer(Texture& texture, const SkColorFilter* colorFilter,
     74             float alpha, SkBlendMode mode, Blend::ModeOrderSwap modeUsage);
     75     GlopBuilder& setFillTextureLayer(GlLayer& layer, float alpha);
     76     // TODO: setFillLayer normally forces its own wrap & filter mode,
     77     // which isn't always correct.
     78     GlopBuilder& setFillExternalTexture(Texture& texture, Matrix4& textureTransform,
     79             bool requiresFilter);
     80 
     81     GlopBuilder& setTransform(const Matrix4& canvas, const int transformFlags);
     82 
     83     GlopBuilder& setModelViewMapUnitToRect(const Rect destination);
     84     GlopBuilder& setModelViewMapUnitToRectSnap(const Rect destination);
     85     GlopBuilder& setModelViewMapUnitToRectOptionalSnap(bool snap, const Rect& destination) {
     86         if (snap) {
     87             return setModelViewMapUnitToRectSnap(destination);
     88         } else {
     89             return setModelViewMapUnitToRect(destination);
     90         }
     91     }
     92     GlopBuilder& setModelViewOffsetRect(float offsetX, float offsetY, const Rect source);
     93     GlopBuilder& setModelViewOffsetRectSnap(float offsetX, float offsetY, const Rect source);
     94     GlopBuilder& setModelViewOffsetRectOptionalSnap(bool snap,
     95             float offsetX, float offsetY, const Rect& source) {
     96         if (snap) {
     97             return setModelViewOffsetRectSnap(offsetX, offsetY, source);
     98         } else {
     99             return setModelViewOffsetRect(offsetX, offsetY, source);
    100         }
    101     }
    102     GlopBuilder& setModelViewIdentityEmptyBounds() {
    103         // pass empty rect since not needed for damage / snap
    104         return setModelViewOffsetRect(0, 0, Rect());
    105     }
    106 
    107     GlopBuilder& setRoundRectClipState(const RoundRectClipState* roundRectClipState);
    108 
    109     GlopBuilder& setGammaCorrection(bool enabled);
    110 
    111     void build();
    112 
    113     static void dump(const Glop& glop);
    114 private:
    115     void setFill(int color, float alphaScale,
    116             SkBlendMode mode, Blend::ModeOrderSwap modeUsage,
    117             const SkShader* shader, const SkColorFilter* colorFilter);
    118 
    119     enum StageFlags {
    120         kInitialStage = 0,
    121         kMeshStage = 1 << 0,
    122         kTransformStage = 1 << 1,
    123         kModelViewStage = 1 << 2,
    124         kFillStage = 1 << 3,
    125         kRoundRectClipStage = 1 << 4,
    126         kAllStages = kMeshStage | kFillStage | kTransformStage | kModelViewStage | kRoundRectClipStage,
    127     } mStageFlags;
    128 
    129     ProgramDescription mDescription;
    130     RenderState& mRenderState;
    131     Caches& mCaches;
    132     const SkShader* mShader;
    133     Glop* mOutGlop;
    134 };
    135 
    136 } /* namespace uirenderer */
    137 } /* namespace android */
    138