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
51namespace android {
52namespace uirenderer {
53
54static 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
61GlopBuilder::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
73GlopBuilder& 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
87GlopBuilder& 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
106GlopBuilder& 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
126GlopBuilder& 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
140GlopBuilder& 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
154GlopBuilder& 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
168GlopBuilder& 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
182GlopBuilder& 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
204GlopBuilder& 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
222void 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
312GlopBuilder& 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
357GlopBuilder& 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
370GlopBuilder& 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
387GlopBuilder& 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
411GlopBuilder& 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
421GlopBuilder& 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
431GlopBuilder& 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
446GlopBuilder& 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
466void 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
479GlopBuilder& 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
488GlopBuilder& 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
512GlopBuilder& 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
521GlopBuilder& 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
546GlopBuilder& 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
558void 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
586void 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