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 
setUnitQuadTextureCoords(Rect uvs,TextureVertex * quadVertex)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 
GlopBuilder(RenderState & renderState,Caches & caches,Glop * outGlop)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 
setMeshUnitQuad()73 GlopBuilder& GlopBuilder::setMeshUnitQuad() {
74     TRIGGER_STAGE(kMeshStage);
75 
76     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
77     mOutGlop->mesh.indices = { 0, nullptr };
78     mOutGlop->mesh.vertices = {
79             mRenderState.meshState().getUnitQuadVBO(),
80             VertexAttribFlags::None,
81             nullptr, nullptr, nullptr,
82             kTextureVertexStride };
83     mOutGlop->mesh.elementCount = 4;
84     return *this;
85 }
86 
setMeshTexturedUnitQuad(const UvMapper * uvMapper)87 GlopBuilder& GlopBuilder::setMeshTexturedUnitQuad(const UvMapper* uvMapper) {
88     if (uvMapper) {
89         // can't use unit quad VBO, so build UV vertices manually
90         return setMeshTexturedUvQuad(uvMapper, Rect(0, 0, 1, 1));
91     }
92 
93     TRIGGER_STAGE(kMeshStage);
94 
95     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
96     mOutGlop->mesh.indices = { 0, nullptr };
97     mOutGlop->mesh.vertices = {
98             mRenderState.meshState().getUnitQuadVBO(),
99             VertexAttribFlags::TextureCoord,
100             nullptr, (const void*) kMeshTextureOffset, nullptr,
101             kTextureVertexStride };
102     mOutGlop->mesh.elementCount = 4;
103     return *this;
104 }
105 
setMeshTexturedUvQuad(const UvMapper * uvMapper,Rect uvs)106 GlopBuilder& GlopBuilder::setMeshTexturedUvQuad(const UvMapper* uvMapper, Rect uvs) {
107     TRIGGER_STAGE(kMeshStage);
108 
109     if (CC_UNLIKELY(uvMapper)) {
110         uvMapper->map(uvs);
111     }
112     setUnitQuadTextureCoords(uvs, &mOutGlop->mesh.mappedVertices[0]);
113 
114     const TextureVertex* textureVertex = mOutGlop->mesh.mappedVertices;
115     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
116     mOutGlop->mesh.indices = { 0, nullptr };
117     mOutGlop->mesh.vertices = {
118             0,
119             VertexAttribFlags::TextureCoord,
120             &textureVertex[0].x, &textureVertex[0].u, nullptr,
121             kTextureVertexStride };
122     mOutGlop->mesh.elementCount = 4;
123     return *this;
124 }
125 
setMeshIndexedQuads(Vertex * vertexData,int quadCount)126 GlopBuilder& GlopBuilder::setMeshIndexedQuads(Vertex* vertexData, int quadCount) {
127     TRIGGER_STAGE(kMeshStage);
128 
129     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
130     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
131     mOutGlop->mesh.vertices = {
132             0,
133             VertexAttribFlags::None,
134             vertexData, nullptr, nullptr,
135             kVertexStride };
136     mOutGlop->mesh.elementCount = 6 * quadCount;
137     return *this;
138 }
139 
setMeshTexturedIndexedQuads(TextureVertex * vertexData,int elementCount)140 GlopBuilder& GlopBuilder::setMeshTexturedIndexedQuads(TextureVertex* vertexData, int elementCount) {
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::TextureCoord,
148             &vertexData[0].x, &vertexData[0].u, nullptr,
149             kTextureVertexStride };
150     mOutGlop->mesh.elementCount = elementCount;
151     return *this;
152 }
153 
setMeshTexturedMesh(TextureVertex * vertexData,int elementCount)154 GlopBuilder& GlopBuilder::setMeshTexturedMesh(TextureVertex* vertexData, int elementCount) {
155     TRIGGER_STAGE(kMeshStage);
156 
157     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
158     mOutGlop->mesh.indices = { 0, 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 
setMeshColoredTexturedMesh(ColorTextureVertex * vertexData,int elementCount)168 GlopBuilder& GlopBuilder::setMeshColoredTexturedMesh(ColorTextureVertex* 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 | VertexAttribFlags::Color,
176             &vertexData[0].x, &vertexData[0].u, &vertexData[0].r,
177             kColorTextureVertexStride };
178     mOutGlop->mesh.elementCount = elementCount;
179     return *this;
180 }
181 
setMeshVertexBuffer(const VertexBuffer & vertexBuffer,bool shadowInterp)182 GlopBuilder& GlopBuilder::setMeshVertexBuffer(const VertexBuffer& vertexBuffer, bool shadowInterp) {
183     TRIGGER_STAGE(kMeshStage);
184 
185     const VertexBuffer::MeshFeatureFlags flags = vertexBuffer.getMeshFeatureFlags();
186 
187     bool alphaVertex = flags & VertexBuffer::kAlpha;
188     bool indices = flags & VertexBuffer::kIndices;
189 
190     mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
191     mOutGlop->mesh.indices = { 0, vertexBuffer.getIndices() };
192     mOutGlop->mesh.vertices = {
193             0,
194             alphaVertex ? VertexAttribFlags::Alpha : VertexAttribFlags::None,
195             vertexBuffer.getBuffer(), nullptr, nullptr,
196             alphaVertex ? kAlphaVertexStride : kVertexStride };
197     mOutGlop->mesh.elementCount = indices
198                 ? vertexBuffer.getIndexCount() : vertexBuffer.getVertexCount();
199 
200     mDescription.useShadowAlphaInterp = shadowInterp;
201     return *this;
202 }
203 
setMeshPatchQuads(const Patch & patch)204 GlopBuilder& GlopBuilder::setMeshPatchQuads(const Patch& patch) {
205     TRIGGER_STAGE(kMeshStage);
206 
207     mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
208     mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
209     mOutGlop->mesh.vertices = {
210             mCaches.patchCache.getMeshBuffer(),
211             VertexAttribFlags::TextureCoord,
212             (void*)patch.positionOffset, (void*)patch.textureOffset, nullptr,
213             kTextureVertexStride };
214     mOutGlop->mesh.elementCount = patch.indexCount;
215     return *this;
216 }
217 
218 ////////////////////////////////////////////////////////////////////////////////
219 // Fill
220 ////////////////////////////////////////////////////////////////////////////////
221 
setFill(int color,float alphaScale,SkXfermode::Mode mode,Blend::ModeOrderSwap modeUsage,const SkShader * shader,const SkColorFilter * colorFilter)222 void GlopBuilder::setFill(int color, float alphaScale,
223         SkXfermode::Mode mode, Blend::ModeOrderSwap modeUsage,
224         const SkShader* shader, const SkColorFilter* colorFilter) {
225     if (mode != SkXfermode::kClear_Mode) {
226         float alpha = (SkColorGetA(color) / 255.0f) * alphaScale;
227         if (!shader) {
228             float colorScale = alpha / 255.0f;
229             mOutGlop->fill.color = {
230                     colorScale * SkColorGetR(color),
231                     colorScale * SkColorGetG(color),
232                     colorScale * SkColorGetB(color),
233                     alpha
234             };
235         } else {
236             mOutGlop->fill.color = { 1, 1, 1, alpha };
237         }
238     } else {
239         mOutGlop->fill.color = { 0, 0, 0, 1 };
240     }
241 
242     mOutGlop->blend = { GL_ZERO, GL_ZERO };
243     if (mOutGlop->fill.color.a < 1.0f
244             || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
245             || (mOutGlop->fill.texture.texture && mOutGlop->fill.texture.texture->blend)
246             || mOutGlop->roundRectClipState
247             || PaintUtils::isBlendedShader(shader)
248             || PaintUtils::isBlendedColorFilter(colorFilter)
249             || mode != SkXfermode::kSrcOver_Mode) {
250         if (CC_LIKELY(mode <= SkXfermode::kScreen_Mode)) {
251             Blend::getFactors(mode, modeUsage,
252                     &mOutGlop->blend.src, &mOutGlop->blend.dst);
253         } else {
254             // These blend modes are not supported by OpenGL directly and have
255             // to be implemented using shaders. Since the shader will perform
256             // the blending, don't enable GL blending off here
257             // If the blend mode cannot be implemented using shaders, fall
258             // back to the default SrcOver blend mode instead
259             if (CC_UNLIKELY(mCaches.extensions().hasFramebufferFetch())) {
260                 mDescription.framebufferMode = mode;
261                 mDescription.swapSrcDst = (modeUsage == Blend::ModeOrderSwap::Swap);
262                 // blending in shader, don't enable
263             } else {
264                 // unsupported
265                 Blend::getFactors(SkXfermode::kSrcOver_Mode, modeUsage,
266                         &mOutGlop->blend.src, &mOutGlop->blend.dst);
267             }
268         }
269     }
270     mShader = shader; // shader resolved in ::build()
271 
272     if (colorFilter) {
273         SkColor color;
274         SkXfermode::Mode mode;
275         SkScalar srcColorMatrix[20];
276         if (colorFilter->asColorMode(&color, &mode)) {
277             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::kColorBlend;
278             mDescription.colorMode = mode;
279 
280             const float alpha = SkColorGetA(color) / 255.0f;
281             float colorScale = alpha / 255.0f;
282             mOutGlop->fill.filter.color = {
283                     colorScale * SkColorGetR(color),
284                     colorScale * SkColorGetG(color),
285                     colorScale * SkColorGetB(color),
286                     alpha,
287             };
288         } else if (colorFilter->asColorMatrix(srcColorMatrix)) {
289             mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::kColorMatrix;
290 
291             float* colorMatrix = mOutGlop->fill.filter.matrix.matrix;
292             memcpy(colorMatrix, srcColorMatrix, 4 * sizeof(float));
293             memcpy(&colorMatrix[4], &srcColorMatrix[5], 4 * sizeof(float));
294             memcpy(&colorMatrix[8], &srcColorMatrix[10], 4 * sizeof(float));
295             memcpy(&colorMatrix[12], &srcColorMatrix[15], 4 * sizeof(float));
296 
297             // Skia uses the range [0..255] for the addition vector, but we need
298             // the [0..1] range to apply the vector in GLSL
299             float* colorVector = mOutGlop->fill.filter.matrix.vector;
300             colorVector[0] = srcColorMatrix[4] / 255.0f;
301             colorVector[1] = srcColorMatrix[9] / 255.0f;
302             colorVector[2] = srcColorMatrix[14] / 255.0f;
303             colorVector[3] = srcColorMatrix[19] / 255.0f;
304         } else {
305             LOG_ALWAYS_FATAL("unsupported ColorFilter");
306         }
307     } else {
308         mOutGlop->fill.filterMode = ProgramDescription::kColorNone;
309     }
310 }
311 
setFillTexturePaint(Texture & texture,const int textureFillFlags,const SkPaint * paint,float alphaScale)312 GlopBuilder& GlopBuilder::setFillTexturePaint(Texture& texture,
313         const int textureFillFlags, const SkPaint* paint, float alphaScale) {
314     TRIGGER_STAGE(kFillStage);
315     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
316 
317     GLenum filter = (textureFillFlags & TextureFillFlags::ForceFilter)
318             ? GL_LINEAR : PaintUtils::getFilter(paint);
319     mOutGlop->fill.texture = { &texture,
320             GL_TEXTURE_2D, filter, GL_CLAMP_TO_EDGE, nullptr };
321 
322     if (paint) {
323         int color = paint->getColor();
324         SkShader* shader = paint->getShader();
325 
326         if (!(textureFillFlags & TextureFillFlags::IsAlphaMaskTexture)) {
327             // Texture defines color, so disable shaders, and reset all non-alpha color channels
328             color |= 0x00FFFFFF;
329             shader = nullptr;
330         }
331         setFill(color, alphaScale,
332                 PaintUtils::getXfermode(paint->getXfermode()), Blend::ModeOrderSwap::NoSwap,
333                 shader, paint->getColorFilter());
334     } else {
335         mOutGlop->fill.color = { alphaScale, alphaScale, alphaScale, alphaScale };
336 
337         if (alphaScale < 1.0f
338                 || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
339                 || texture.blend
340                 || mOutGlop->roundRectClipState) {
341             Blend::getFactors(SkXfermode::kSrcOver_Mode, Blend::ModeOrderSwap::NoSwap,
342                     &mOutGlop->blend.src, &mOutGlop->blend.dst);
343         } else {
344             mOutGlop->blend = { GL_ZERO, GL_ZERO };
345         }
346     }
347 
348     if (textureFillFlags & TextureFillFlags::IsAlphaMaskTexture) {
349         mDescription.modulate = mOutGlop->fill.color.isNotBlack();
350         mDescription.hasAlpha8Texture = true;
351     } else {
352         mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
353     }
354     return *this;
355 }
356 
setFillPaint(const SkPaint & paint,float alphaScale)357 GlopBuilder& GlopBuilder::setFillPaint(const SkPaint& paint, float alphaScale) {
358     TRIGGER_STAGE(kFillStage);
359     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
360 
361     mOutGlop->fill.texture = { nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
362 
363     setFill(paint.getColor(), alphaScale,
364             PaintUtils::getXfermode(paint.getXfermode()), Blend::ModeOrderSwap::NoSwap,
365             paint.getShader(), paint.getColorFilter());
366     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
367     return *this;
368 }
369 
setFillPathTexturePaint(PathTexture & texture,const SkPaint & paint,float alphaScale)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_TEXTURE_2D, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
377 
378     setFill(paint.getColor(), alphaScale,
379             PaintUtils::getXfermode(paint.getXfermode()), 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 
setFillShadowTexturePaint(ShadowTexture & texture,int shadowColor,const SkPaint & paint,float alphaScale)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_TEXTURE_2D, 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             PaintUtils::getXfermode(paint.getXfermode()), 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 
setFillBlack()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, GL_INVALID_ENUM, nullptr };
416     setFill(SK_ColorBLACK, 1.0f, SkXfermode::kSrcOver_Mode, Blend::ModeOrderSwap::NoSwap,
417             nullptr, nullptr);
418     return *this;
419 }
420 
setFillClear()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, GL_INVALID_ENUM, nullptr };
426     setFill(SK_ColorBLACK, 1.0f, SkXfermode::kClear_Mode, Blend::ModeOrderSwap::NoSwap,
427             nullptr, nullptr);
428     return *this;
429 }
430 
setFillLayer(Texture & texture,const SkColorFilter * colorFilter,float alpha,SkXfermode::Mode mode,Blend::ModeOrderSwap modeUsage)431 GlopBuilder& GlopBuilder::setFillLayer(Texture& texture, const SkColorFilter* colorFilter,
432         float alpha, SkXfermode::Mode mode, Blend::ModeOrderSwap modeUsage) {
433     TRIGGER_STAGE(kFillStage);
434     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
435 
436     mOutGlop->fill.texture = { &texture,
437             GL_TEXTURE_2D, GL_LINEAR, GL_CLAMP_TO_EDGE, nullptr };
438     mOutGlop->fill.color = { alpha, alpha, alpha, alpha };
439 
440     setFill(SK_ColorWHITE, alpha, mode, modeUsage, nullptr, colorFilter);
441 
442     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
443     return *this;
444 }
445 
setFillTextureLayer(Layer & layer,float alpha)446 GlopBuilder& GlopBuilder::setFillTextureLayer(Layer& layer, float alpha) {
447     TRIGGER_STAGE(kFillStage);
448     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
449 
450     mOutGlop->fill.texture = { &(layer.getTexture()),
451             layer.getRenderTarget(), GL_LINEAR, GL_CLAMP_TO_EDGE, &layer.getTexTransform() };
452     mOutGlop->fill.color = { alpha, alpha, alpha, alpha };
453 
454     setFill(SK_ColorWHITE, alpha, layer.getMode(), Blend::ModeOrderSwap::NoSwap,
455             nullptr, layer.getColorFilter());
456 
457     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
458     mDescription.hasTextureTransform = true;
459     return *this;
460 }
461 
462 ////////////////////////////////////////////////////////////////////////////////
463 // Transform
464 ////////////////////////////////////////////////////////////////////////////////
465 
setTransform(const Matrix4 & ortho,const Matrix4 & canvas,const int transformFlags)466 void GlopBuilder::setTransform(const Matrix4& ortho, const Matrix4& canvas,
467         const int transformFlags) {
468     TRIGGER_STAGE(kTransformStage);
469 
470     mOutGlop->transform.ortho.load(ortho);
471     mOutGlop->transform.canvas.load(canvas);
472     mOutGlop->transform.transformFlags = transformFlags;
473 }
474 
475 ////////////////////////////////////////////////////////////////////////////////
476 // ModelView
477 ////////////////////////////////////////////////////////////////////////////////
478 
setModelViewMapUnitToRect(const Rect destination)479 GlopBuilder& GlopBuilder::setModelViewMapUnitToRect(const Rect destination) {
480     TRIGGER_STAGE(kModelViewStage);
481 
482     mOutGlop->transform.modelView.loadTranslate(destination.left, destination.top, 0.0f);
483     mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
484     mOutGlop->bounds = destination;
485     return *this;
486 }
487 
setModelViewMapUnitToRectSnap(const Rect destination)488 GlopBuilder& GlopBuilder::setModelViewMapUnitToRectSnap(const Rect destination) {
489     TRIGGER_STAGE(kModelViewStage);
490     REQUIRE_STAGES(kTransformStage | kFillStage);
491 
492     float left = destination.left;
493     float top = destination.top;
494 
495     const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
496     if (CC_LIKELY(meshTransform.isPureTranslate())) {
497         // snap by adjusting the model view matrix
498         const float translateX = meshTransform.getTranslateX();
499         const float translateY = meshTransform.getTranslateY();
500 
501         left = (int) floorf(left + translateX + 0.5f) - translateX;
502         top = (int) floorf(top + translateY + 0.5f) - translateY;
503         mOutGlop->fill.texture.filter = GL_NEAREST;
504     }
505 
506     mOutGlop->transform.modelView.loadTranslate(left, top, 0.0f);
507     mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
508     mOutGlop->bounds = destination;
509     return *this;
510 }
511 
setModelViewOffsetRect(float offsetX,float offsetY,const Rect source)512 GlopBuilder& GlopBuilder::setModelViewOffsetRect(float offsetX, float offsetY, const Rect source) {
513     TRIGGER_STAGE(kModelViewStage);
514 
515     mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
516     mOutGlop->bounds = source;
517     mOutGlop->bounds.translate(offsetX, offsetY);
518     return *this;
519 }
520 
setModelViewOffsetRectSnap(float offsetX,float offsetY,const Rect source)521 GlopBuilder& GlopBuilder::setModelViewOffsetRectSnap(float offsetX, float offsetY, const Rect source) {
522     TRIGGER_STAGE(kModelViewStage);
523     REQUIRE_STAGES(kTransformStage | kFillStage);
524 
525     const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
526     if (CC_LIKELY(meshTransform.isPureTranslate())) {
527         // snap by adjusting the model view matrix
528         const float translateX = meshTransform.getTranslateX();
529         const float translateY = meshTransform.getTranslateY();
530 
531         offsetX = (int) floorf(offsetX + translateX + source.left + 0.5f) - translateX - source.left;
532         offsetY = (int) floorf(offsetY + translateY + source.top + 0.5f) - translateY - source.top;
533         mOutGlop->fill.texture.filter = GL_NEAREST;
534     }
535 
536     mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
537     mOutGlop->bounds = source;
538     mOutGlop->bounds.translate(offsetX, offsetY);
539     return *this;
540 }
541 
542 ////////////////////////////////////////////////////////////////////////////////
543 // RoundRectClip
544 ////////////////////////////////////////////////////////////////////////////////
545 
setRoundRectClipState(const RoundRectClipState * roundRectClipState)546 GlopBuilder& GlopBuilder::setRoundRectClipState(const RoundRectClipState* roundRectClipState) {
547     TRIGGER_STAGE(kRoundRectClipStage);
548 
549     mOutGlop->roundRectClipState = roundRectClipState;
550     mDescription.hasRoundRectClip = roundRectClipState != nullptr;
551     return *this;
552 }
553 
554 ////////////////////////////////////////////////////////////////////////////////
555 // Build
556 ////////////////////////////////////////////////////////////////////////////////
557 
verify(const ProgramDescription & description,const Glop & glop)558 void verify(const ProgramDescription& description, const Glop& glop) {
559     if (glop.fill.texture.texture != nullptr) {
560         LOG_ALWAYS_FATAL_IF(((description.hasTexture && description.hasExternalTexture)
561                         || (!description.hasTexture && !description.hasExternalTexture)
562                         || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) == 0)),
563                 "Texture %p, hT%d, hET %d, attribFlags %x",
564                 glop.fill.texture.texture,
565                 description.hasTexture, description.hasExternalTexture,
566                 glop.mesh.vertices.attribFlags);
567     } else {
568         LOG_ALWAYS_FATAL_IF((description.hasTexture
569                         || description.hasExternalTexture
570                         || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) != 0)),
571                 "No texture, hT%d, hET %d, attribFlags %x",
572                 description.hasTexture, description.hasExternalTexture,
573                 glop.mesh.vertices.attribFlags);
574     }
575 
576     if ((glop.mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
577             && glop.mesh.vertices.bufferObject) {
578         LOG_ALWAYS_FATAL("VBO and alpha attributes are not currently compatible");
579     }
580 
581     if (description.hasTextureTransform != (glop.fill.texture.textureTransform != nullptr)) {
582         LOG_ALWAYS_FATAL("Texture transform incorrectly specified");
583     }
584 }
585 
build()586 void GlopBuilder::build() {
587     REQUIRE_STAGES(kAllStages);
588     if (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) {
589         if (mOutGlop->fill.texture.target == GL_TEXTURE_2D) {
590             mDescription.hasTexture = true;
591         } else {
592             mDescription.hasExternalTexture = true;
593         }
594     }
595 
596     mDescription.hasColors = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Color;
597     mDescription.hasVertexAlpha = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha;
598 
599     // Enable debug highlight when what we're about to draw is tested against
600     // the stencil buffer and if stencil highlight debugging is on
601     mDescription.hasDebugHighlight = !Properties::debugOverdraw
602             && Properties::debugStencilClip == StencilClipDebug::ShowHighlight
603             && mRenderState.stencil().isTestEnabled();
604 
605     // serialize shader info into ShaderData
606     GLuint textureUnit = mOutGlop->fill.texture.texture ? 1 : 0;
607 
608     if (CC_LIKELY(!mShader)) {
609         mOutGlop->fill.skiaShaderData.skiaShaderType = kNone_SkiaShaderType;
610     } else {
611         Matrix4 shaderMatrix;
612         if (mOutGlop->transform.transformFlags & TransformFlags::MeshIgnoresCanvasTransform) {
613             // canvas level transform was built into the modelView and geometry,
614             // so the shader matrix must reverse this
615             shaderMatrix.loadInverse(mOutGlop->transform.canvas);
616             shaderMatrix.multiply(mOutGlop->transform.modelView);
617         } else {
618             shaderMatrix.load(mOutGlop->transform.modelView);
619         }
620         SkiaShader::store(mCaches, *mShader, shaderMatrix,
621                 &textureUnit, &mDescription, &(mOutGlop->fill.skiaShaderData));
622     }
623 
624     // duplicates ProgramCache's definition of color uniform presence
625     const bool singleColor = !mDescription.hasTexture
626             && !mDescription.hasExternalTexture
627             && !mDescription.hasGradient
628             && !mDescription.hasBitmap;
629     mOutGlop->fill.colorEnabled = mDescription.modulate || singleColor;
630 
631     verify(mDescription, *mOutGlop);
632 
633     // Final step: populate program and map bounds into render target space
634     mOutGlop->fill.program = mCaches.programCache.get(mDescription);
635     mOutGlop->transform.meshTransform().mapRect(mOutGlop->bounds);
636 }
637 
638 } /* namespace uirenderer */
639 } /* namespace android */
640