GlopBuilder.cpp revision 8cd3edfa15cc9cdbffa935d19ab894426b08d174 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include "GlopBuilder.h"
17
18#include "Caches.h"
19#include "GlLayer.h"
20#include "Glop.h"
21#include "Layer.h"
22#include "Matrix.h"
23#include "Patch.h"
24#include "PathCache.h"
25#include "renderstate/MeshState.h"
26#include "renderstate/RenderState.h"
27#include "SkiaShader.h"
28#include "Texture.h"
29#include "utils/PaintUtils.h"
30#include "VertexBuffer.h"
31
32#include <GLES2/gl2.h>
33#include <SkPaint.h>
34
35#define DEBUG_GLOP_BUILDER 0
36
37#if DEBUG_GLOP_BUILDER
38
39#define TRIGGER_STAGE(stageFlag) \
40    LOG_ALWAYS_FATAL_IF((stageFlag) & mStageFlags, "Stage %d cannot be run twice", (stageFlag)); \
41    mStageFlags = static_cast<StageFlags>(mStageFlags | (stageFlag))
42
43#define REQUIRE_STAGES(requiredFlags) \
44    LOG_ALWAYS_FATAL_IF((mStageFlags & (requiredFlags)) != (requiredFlags), \
45            "not prepared for current stage")
46
47#else
48
49#define TRIGGER_STAGE(stageFlag) ((void)0)
50#define REQUIRE_STAGES(requiredFlags) ((void)0)
51
52#endif
53
54namespace android {
55namespace uirenderer {
56
57static void setUnitQuadTextureCoords(Rect uvs, TextureVertex* quadVertex) {
58    quadVertex[0] = {0, 0, uvs.left, uvs.top};
59    quadVertex[1] = {1, 0, uvs.right, uvs.top};
60    quadVertex[2] = {0, 1, uvs.left, uvs.bottom};
61    quadVertex[3] = {1, 1, uvs.right, uvs.bottom};
62}
63
64GlopBuilder::GlopBuilder(RenderState& renderState, Caches& caches, Glop* outGlop)
65        : mRenderState(renderState)
66        , mCaches(caches)
67        , mShader(nullptr)
68        , mOutGlop(outGlop) {
69    mStageFlags = kInitialStage;
70}
71
72////////////////////////////////////////////////////////////////////////////////
73// Mesh
74////////////////////////////////////////////////////////////////////////////////
75
76GlopBuilder& GlopBuilder::setMeshTexturedIndexedVbo(GLuint vbo, GLsizei elementCount) {
77    TRIGGER_STAGE(kMeshStage);
78
79    mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
80    mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
81    mOutGlop->mesh.vertices = {
82            vbo,
83            VertexAttribFlags::TextureCoord,
84            nullptr, (const void*) kMeshTextureOffset, nullptr,
85            kTextureVertexStride };
86    mOutGlop->mesh.elementCount = elementCount;
87    return *this;
88}
89
90GlopBuilder& GlopBuilder::setMeshUnitQuad() {
91    TRIGGER_STAGE(kMeshStage);
92
93    mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
94    mOutGlop->mesh.indices = { 0, nullptr };
95    mOutGlop->mesh.vertices = {
96            mRenderState.meshState().getUnitQuadVBO(),
97            VertexAttribFlags::None,
98            nullptr, nullptr, nullptr,
99            kTextureVertexStride };
100    mOutGlop->mesh.elementCount = 4;
101    return *this;
102}
103
104GlopBuilder& GlopBuilder::setMeshTexturedUnitQuad(const UvMapper* uvMapper) {
105    if (uvMapper) {
106        // can't use unit quad VBO, so build UV vertices manually
107        return setMeshTexturedUvQuad(uvMapper, Rect(1, 1));
108    }
109
110    TRIGGER_STAGE(kMeshStage);
111
112    mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
113    mOutGlop->mesh.indices = { 0, nullptr };
114    mOutGlop->mesh.vertices = {
115            mRenderState.meshState().getUnitQuadVBO(),
116            VertexAttribFlags::TextureCoord,
117            nullptr, (const void*) kMeshTextureOffset, nullptr,
118            kTextureVertexStride };
119    mOutGlop->mesh.elementCount = 4;
120    return *this;
121}
122
123GlopBuilder& GlopBuilder::setMeshTexturedUvQuad(const UvMapper* uvMapper, Rect uvs) {
124    TRIGGER_STAGE(kMeshStage);
125
126    if (CC_UNLIKELY(uvMapper)) {
127        uvMapper->map(uvs);
128    }
129    setUnitQuadTextureCoords(uvs, &mOutGlop->mesh.mappedVertices[0]);
130
131    const TextureVertex* textureVertex = mOutGlop->mesh.mappedVertices;
132    mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
133    mOutGlop->mesh.indices = { 0, nullptr };
134    mOutGlop->mesh.vertices = {
135            0,
136            VertexAttribFlags::TextureCoord,
137            &textureVertex[0].x, &textureVertex[0].u, nullptr,
138            kTextureVertexStride };
139    mOutGlop->mesh.elementCount = 4;
140    return *this;
141}
142
143GlopBuilder& GlopBuilder::setMeshIndexedQuads(Vertex* vertexData, int quadCount) {
144    TRIGGER_STAGE(kMeshStage);
145
146    mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
147    mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
148    mOutGlop->mesh.vertices = {
149            0,
150            VertexAttribFlags::None,
151            vertexData, nullptr, nullptr,
152            kVertexStride };
153    mOutGlop->mesh.elementCount = 6 * quadCount;
154    return *this;
155}
156
157GlopBuilder& GlopBuilder::setMeshTexturedIndexedQuads(TextureVertex* vertexData, int elementCount) {
158    TRIGGER_STAGE(kMeshStage);
159
160    mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
161    mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
162    mOutGlop->mesh.vertices = {
163            0,
164            VertexAttribFlags::TextureCoord,
165            &vertexData[0].x, &vertexData[0].u, nullptr,
166            kTextureVertexStride };
167    mOutGlop->mesh.elementCount = elementCount;
168    return *this;
169}
170
171GlopBuilder& GlopBuilder::setMeshColoredTexturedMesh(ColorTextureVertex* vertexData, int elementCount) {
172    TRIGGER_STAGE(kMeshStage);
173
174    mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
175    mOutGlop->mesh.indices = { 0, nullptr };
176    mOutGlop->mesh.vertices = {
177            0,
178            VertexAttribFlags::TextureCoord | VertexAttribFlags::Color,
179            &vertexData[0].x, &vertexData[0].u, &vertexData[0].r,
180            kColorTextureVertexStride };
181    mOutGlop->mesh.elementCount = elementCount;
182    return *this;
183}
184
185GlopBuilder& GlopBuilder::setMeshVertexBuffer(const VertexBuffer& vertexBuffer) {
186    TRIGGER_STAGE(kMeshStage);
187
188    const VertexBuffer::MeshFeatureFlags flags = vertexBuffer.getMeshFeatureFlags();
189
190    bool alphaVertex = flags & VertexBuffer::kAlpha;
191    bool indices = flags & VertexBuffer::kIndices;
192
193    mOutGlop->mesh.primitiveMode = GL_TRIANGLE_STRIP;
194    mOutGlop->mesh.indices = { 0, vertexBuffer.getIndices() };
195    mOutGlop->mesh.vertices = {
196            0,
197            alphaVertex ? VertexAttribFlags::Alpha : VertexAttribFlags::None,
198            vertexBuffer.getBuffer(), nullptr, nullptr,
199            alphaVertex ? kAlphaVertexStride : kVertexStride };
200    mOutGlop->mesh.elementCount = indices
201                ? vertexBuffer.getIndexCount() : vertexBuffer.getVertexCount();
202    return *this;
203}
204
205GlopBuilder& GlopBuilder::setMeshPatchQuads(const Patch& patch) {
206    TRIGGER_STAGE(kMeshStage);
207
208    mOutGlop->mesh.primitiveMode = GL_TRIANGLES;
209    mOutGlop->mesh.indices = { mRenderState.meshState().getQuadListIBO(), nullptr };
210    mOutGlop->mesh.vertices = {
211            mCaches.patchCache.getMeshBuffer(),
212            VertexAttribFlags::TextureCoord,
213            (void*)patch.positionOffset, (void*)patch.textureOffset, nullptr,
214            kTextureVertexStride };
215    mOutGlop->mesh.elementCount = patch.indexCount;
216    return *this;
217}
218
219////////////////////////////////////////////////////////////////////////////////
220// Fill
221////////////////////////////////////////////////////////////////////////////////
222
223void GlopBuilder::setFill(int color, float alphaScale,
224        SkBlendMode mode, Blend::ModeOrderSwap modeUsage,
225        const SkShader* shader, const SkColorFilter* colorFilter) {
226    if (mode != SkBlendMode::kClear) {
227        if (!shader) {
228            FloatColor c;
229            c.set(color);
230            c.r *= alphaScale;
231            c.g *= alphaScale;
232            c.b *= alphaScale;
233            c.a *= alphaScale;
234            mOutGlop->fill.color = c;
235        } else {
236            float alpha = (SkColorGetA(color) / 255.0f) * alphaScale;
237            mOutGlop->fill.color = { 1, 1, 1, alpha };
238        }
239    } else {
240        mOutGlop->fill.color = { 0, 0, 0, 1 };
241    }
242
243    mOutGlop->blend = { GL_ZERO, GL_ZERO };
244    if (mOutGlop->fill.color.a < 1.0f
245            || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
246            || (mOutGlop->fill.texture.texture && mOutGlop->fill.texture.texture->blend)
247            || mOutGlop->roundRectClipState
248            || PaintUtils::isBlendedShader(shader)
249            || PaintUtils::isBlendedColorFilter(colorFilter)
250            || mode != SkBlendMode::kSrcOver) {
251        if (CC_LIKELY(mode <= SkBlendMode::kScreen)) {
252            Blend::getFactors(mode, modeUsage,
253                    &mOutGlop->blend.src, &mOutGlop->blend.dst);
254        } else {
255            // These blend modes are not supported by OpenGL directly and have
256            // to be implemented using shaders. Since the shader will perform
257            // the blending, don't enable GL blending off here
258            // If the blend mode cannot be implemented using shaders, fall
259            // back to the default SrcOver blend mode instead
260            if (CC_UNLIKELY(mCaches.extensions().hasFramebufferFetch())) {
261                mDescription.framebufferMode = mode;
262                mDescription.swapSrcDst = (modeUsage == Blend::ModeOrderSwap::Swap);
263                // blending in shader, don't enable
264            } else {
265                // unsupported
266                Blend::getFactors(SkBlendMode::kSrcOver, modeUsage,
267                        &mOutGlop->blend.src, &mOutGlop->blend.dst);
268            }
269        }
270    }
271    mShader = shader; // shader resolved in ::build()
272
273    if (colorFilter) {
274        SkColor color;
275        SkBlendMode bmode;
276        SkScalar srcColorMatrix[20];
277        if (colorFilter->asColorMode(&color, &bmode)) {
278            mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::ColorFilterMode::Blend;
279            mDescription.colorMode = bmode;
280            mOutGlop->fill.filter.color.set(color);
281        } else if (colorFilter->asColorMatrix(srcColorMatrix)) {
282            mOutGlop->fill.filterMode = mDescription.colorOp = ProgramDescription::ColorFilterMode::Matrix;
283
284            float* colorMatrix = mOutGlop->fill.filter.matrix.matrix;
285            memcpy(colorMatrix, srcColorMatrix, 4 * sizeof(float));
286            memcpy(&colorMatrix[4], &srcColorMatrix[5], 4 * sizeof(float));
287            memcpy(&colorMatrix[8], &srcColorMatrix[10], 4 * sizeof(float));
288            memcpy(&colorMatrix[12], &srcColorMatrix[15], 4 * sizeof(float));
289
290            // Skia uses the range [0..255] for the addition vector, but we need
291            // the [0..1] range to apply the vector in GLSL
292            float* colorVector = mOutGlop->fill.filter.matrix.vector;
293            colorVector[0] = EOCF(srcColorMatrix[4]  / 255.0f);
294            colorVector[1] = EOCF(srcColorMatrix[9]  / 255.0f);
295            colorVector[2] = EOCF(srcColorMatrix[14] / 255.0f);
296            colorVector[3] =      srcColorMatrix[19] / 255.0f;  // alpha is linear
297        } else {
298            LOG_ALWAYS_FATAL("unsupported ColorFilter");
299        }
300    } else {
301        mOutGlop->fill.filterMode = ProgramDescription::ColorFilterMode::None;
302    }
303}
304
305GlopBuilder& GlopBuilder::setFillTexturePaint(Texture& texture,
306        const int textureFillFlags, const SkPaint* paint, float alphaScale) {
307    TRIGGER_STAGE(kFillStage);
308    REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
309
310    GLenum filter = (textureFillFlags & TextureFillFlags::ForceFilter)
311            ? GL_LINEAR : PaintUtils::getFilter(paint);
312    mOutGlop->fill.texture = { &texture, filter, GL_CLAMP_TO_EDGE, nullptr };
313
314    if (paint) {
315        int color = paint->getColor();
316        SkShader* shader = paint->getShader();
317
318        if (!(textureFillFlags & TextureFillFlags::IsAlphaMaskTexture)) {
319            // Texture defines color, so disable shaders, and reset all non-alpha color channels
320            color |= 0x00FFFFFF;
321            shader = nullptr;
322        }
323        setFill(color, alphaScale,
324                paint->getBlendMode(), Blend::ModeOrderSwap::NoSwap,
325                shader, paint->getColorFilter());
326    } else {
327        mOutGlop->fill.color = { alphaScale, alphaScale, alphaScale, alphaScale };
328
329        if (alphaScale < 1.0f
330                || (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
331                || texture.blend
332                || mOutGlop->roundRectClipState) {
333            Blend::getFactors(SkBlendMode::kSrcOver, Blend::ModeOrderSwap::NoSwap,
334                    &mOutGlop->blend.src, &mOutGlop->blend.dst);
335        } else {
336            mOutGlop->blend = { GL_ZERO, GL_ZERO };
337        }
338    }
339
340    if (textureFillFlags & TextureFillFlags::IsAlphaMaskTexture) {
341        mDescription.modulate = mOutGlop->fill.color.isNotBlack();
342        mDescription.hasAlpha8Texture = true;
343    } else {
344        mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
345    }
346    return *this;
347}
348
349GlopBuilder& GlopBuilder::setFillPaint(const SkPaint& paint, float alphaScale, bool shadowInterp) {
350    TRIGGER_STAGE(kFillStage);
351    REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
352
353    if (CC_LIKELY(!shadowInterp)) {
354        mOutGlop->fill.texture = {
355                nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
356    } else {
357        mOutGlop->fill.texture = {
358                mCaches.textureState().getShadowLutTexture(),
359                GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
360    }
361
362    setFill(paint.getColor(), alphaScale,
363            paint.getBlendMode(), Blend::ModeOrderSwap::NoSwap,
364            paint.getShader(), paint.getColorFilter());
365    mDescription.useShadowAlphaInterp = shadowInterp;
366    mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
367    return *this;
368}
369
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_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
377
378    setFill(paint.getColor(), alphaScale,
379            paint.getBlendMode(), Blend::ModeOrderSwap::NoSwap,
380            paint.getShader(), paint.getColorFilter());
381
382    mDescription.hasAlpha8Texture = true;
383    mDescription.modulate = mOutGlop->fill.color.isNotBlack();
384    return *this;
385}
386
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_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
394
395    const int ALPHA_BITMASK = SK_ColorBLACK;
396    const int COLOR_BITMASK = ~ALPHA_BITMASK;
397    if ((shadowColor & ALPHA_BITMASK) == ALPHA_BITMASK) {
398        // shadow color is fully opaque: override its alpha with that of paint
399        shadowColor &= paint.getColor() | COLOR_BITMASK;
400    }
401
402    setFill(shadowColor, alphaScale,
403            paint.getBlendMode(), Blend::ModeOrderSwap::NoSwap,
404            paint.getShader(), paint.getColorFilter());
405
406    mDescription.hasAlpha8Texture = true;
407    mDescription.modulate = mOutGlop->fill.color.isNotBlack();
408    return *this;
409}
410
411GlopBuilder& GlopBuilder::setFillBlack() {
412    TRIGGER_STAGE(kFillStage);
413    REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
414
415    mOutGlop->fill.texture = { nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
416    setFill(SK_ColorBLACK, 1.0f, SkBlendMode::kSrcOver, Blend::ModeOrderSwap::NoSwap,
417            nullptr, nullptr);
418    return *this;
419}
420
421GlopBuilder& GlopBuilder::setFillClear() {
422    TRIGGER_STAGE(kFillStage);
423    REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
424
425    mOutGlop->fill.texture = { nullptr, GL_INVALID_ENUM, GL_INVALID_ENUM, nullptr };
426    setFill(SK_ColorBLACK, 1.0f, SkBlendMode::kClear, Blend::ModeOrderSwap::NoSwap,
427            nullptr, nullptr);
428    return *this;
429}
430
431GlopBuilder& GlopBuilder::setFillLayer(Texture& texture, const SkColorFilter* colorFilter,
432        float alpha, SkBlendMode mode, Blend::ModeOrderSwap modeUsage) {
433    TRIGGER_STAGE(kFillStage);
434    REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
435
436    mOutGlop->fill.texture = { &texture, GL_LINEAR, GL_CLAMP_TO_EDGE, nullptr };
437
438    setFill(SK_ColorWHITE, alpha, mode, modeUsage, nullptr, colorFilter);
439
440    mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
441    return *this;
442}
443
444GlopBuilder& GlopBuilder::setFillTextureLayer(GlLayer& layer, float alpha) {
445    TRIGGER_STAGE(kFillStage);
446    REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
447
448    mOutGlop->fill.texture = { &(layer.getTexture()),
449            GL_LINEAR, GL_CLAMP_TO_EDGE, &layer.getTexTransform() };
450
451    setFill(SK_ColorWHITE, alpha, layer.getMode(), Blend::ModeOrderSwap::NoSwap,
452            nullptr, layer.getColorFilter());
453
454    mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
455    mDescription.hasTextureTransform = true;
456    return *this;
457}
458
459GlopBuilder& GlopBuilder::setFillExternalTexture(Texture& texture, Matrix4& textureTransform) {
460    TRIGGER_STAGE(kFillStage);
461    REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
462
463    mOutGlop->fill.texture = { &texture, GL_LINEAR, GL_CLAMP_TO_EDGE, &textureTransform };
464
465    setFill(SK_ColorWHITE, 1.0f, SkBlendMode::kSrc, Blend::ModeOrderSwap::NoSwap,
466            nullptr, nullptr);
467
468    mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
469    mDescription.hasTextureTransform = true;
470    return *this;
471}
472
473GlopBuilder& GlopBuilder::setGammaCorrection(bool enabled) {
474    REQUIRE_STAGES(kFillStage);
475
476    mDescription.hasGammaCorrection = enabled;
477    return *this;
478}
479
480////////////////////////////////////////////////////////////////////////////////
481// Transform
482////////////////////////////////////////////////////////////////////////////////
483
484GlopBuilder& GlopBuilder::setTransform(const Matrix4& canvas, const int transformFlags) {
485    TRIGGER_STAGE(kTransformStage);
486
487    mOutGlop->transform.canvas = canvas;
488    mOutGlop->transform.transformFlags = transformFlags;
489    return *this;
490}
491
492////////////////////////////////////////////////////////////////////////////////
493// ModelView
494////////////////////////////////////////////////////////////////////////////////
495
496GlopBuilder& GlopBuilder::setModelViewMapUnitToRect(const Rect destination) {
497    TRIGGER_STAGE(kModelViewStage);
498
499    mOutGlop->transform.modelView.loadTranslate(destination.left, destination.top, 0.0f);
500    mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
501    return *this;
502}
503
504GlopBuilder& GlopBuilder::setModelViewMapUnitToRectSnap(const Rect destination) {
505    TRIGGER_STAGE(kModelViewStage);
506    REQUIRE_STAGES(kTransformStage | kFillStage);
507
508    float left = destination.left;
509    float top = destination.top;
510
511    const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
512    if (CC_LIKELY(meshTransform.isPureTranslate())) {
513        // snap by adjusting the model view matrix
514        const float translateX = meshTransform.getTranslateX();
515        const float translateY = meshTransform.getTranslateY();
516
517        left = (int) floorf(left + translateX + 0.5f) - translateX;
518        top = (int) floorf(top + translateY + 0.5f) - translateY;
519        mOutGlop->fill.texture.filter = GL_NEAREST;
520    }
521
522    mOutGlop->transform.modelView.loadTranslate(left, top, 0.0f);
523    mOutGlop->transform.modelView.scale(destination.getWidth(), destination.getHeight(), 1.0f);
524    return *this;
525}
526
527GlopBuilder& GlopBuilder::setModelViewOffsetRect(float offsetX, float offsetY, const Rect source) {
528    TRIGGER_STAGE(kModelViewStage);
529
530    mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
531    return *this;
532}
533
534GlopBuilder& GlopBuilder::setModelViewOffsetRectSnap(float offsetX, float offsetY, const Rect source) {
535    TRIGGER_STAGE(kModelViewStage);
536    REQUIRE_STAGES(kTransformStage | kFillStage);
537
538    const Matrix4& meshTransform = mOutGlop->transform.meshTransform();
539    if (CC_LIKELY(meshTransform.isPureTranslate())) {
540        // snap by adjusting the model view matrix
541        const float translateX = meshTransform.getTranslateX();
542        const float translateY = meshTransform.getTranslateY();
543
544        offsetX = (int) floorf(offsetX + translateX + source.left + 0.5f) - translateX - source.left;
545        offsetY = (int) floorf(offsetY + translateY + source.top + 0.5f) - translateY - source.top;
546        mOutGlop->fill.texture.filter = GL_NEAREST;
547    }
548
549    mOutGlop->transform.modelView.loadTranslate(offsetX, offsetY, 0.0f);
550    return *this;
551}
552
553////////////////////////////////////////////////////////////////////////////////
554// RoundRectClip
555////////////////////////////////////////////////////////////////////////////////
556
557GlopBuilder& GlopBuilder::setRoundRectClipState(const RoundRectClipState* roundRectClipState) {
558    TRIGGER_STAGE(kRoundRectClipStage);
559
560    mOutGlop->roundRectClipState = roundRectClipState;
561    mDescription.hasRoundRectClip = roundRectClipState != nullptr;
562    return *this;
563}
564
565////////////////////////////////////////////////////////////////////////////////
566// Build
567////////////////////////////////////////////////////////////////////////////////
568
569void verify(const ProgramDescription& description, const Glop& glop) {
570    if (glop.fill.texture.texture != nullptr) {
571        LOG_ALWAYS_FATAL_IF(((description.hasTexture && description.hasExternalTexture)
572                        || (!description.hasTexture
573                                && !description.hasExternalTexture
574                                && !description.useShadowAlphaInterp)
575                        || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) == 0
576                                && !description.useShadowAlphaInterp)),
577                "Texture %p, hT%d, hET %d, attribFlags %x",
578                glop.fill.texture.texture,
579                description.hasTexture, description.hasExternalTexture,
580                glop.mesh.vertices.attribFlags);
581    } else {
582        LOG_ALWAYS_FATAL_IF((description.hasTexture
583                        || description.hasExternalTexture
584                        || ((glop.mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) != 0)),
585                "No texture, hT%d, hET %d, attribFlags %x",
586                description.hasTexture, description.hasExternalTexture,
587                glop.mesh.vertices.attribFlags);
588    }
589
590    if ((glop.mesh.vertices.attribFlags & VertexAttribFlags::Alpha)
591            && glop.mesh.vertices.bufferObject) {
592        LOG_ALWAYS_FATAL("VBO and alpha attributes are not currently compatible");
593    }
594
595    if (description.hasTextureTransform != (glop.fill.texture.textureTransform != nullptr)) {
596        LOG_ALWAYS_FATAL("Texture transform incorrectly specified");
597    }
598}
599
600void GlopBuilder::build() {
601    REQUIRE_STAGES(kAllStages);
602    if (mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::TextureCoord) {
603        if (mOutGlop->fill.texture.texture->target() == GL_TEXTURE_2D) {
604            mDescription.hasTexture = true;
605        } else {
606            mDescription.hasExternalTexture = true;
607        }
608    }
609
610    mDescription.hasColors = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Color;
611    mDescription.hasVertexAlpha = mOutGlop->mesh.vertices.attribFlags & VertexAttribFlags::Alpha;
612
613    // Enable debug highlight when what we're about to draw is tested against
614    // the stencil buffer and if stencil highlight debugging is on
615    mDescription.hasDebugHighlight = !Properties::debugOverdraw
616            && Properties::debugStencilClip == StencilClipDebug::ShowHighlight
617            && mRenderState.stencil().isTestEnabled();
618
619    // serialize shader info into ShaderData
620    GLuint textureUnit = mOutGlop->fill.texture.texture ? 1 : 0;
621
622    if (CC_LIKELY(!mShader)) {
623        mOutGlop->fill.skiaShaderData.skiaShaderType = kNone_SkiaShaderType;
624    } else {
625        Matrix4 shaderMatrix;
626        if (mOutGlop->transform.transformFlags & TransformFlags::MeshIgnoresCanvasTransform) {
627            // canvas level transform was built into the modelView and geometry,
628            // so the shader matrix must reverse this
629            shaderMatrix.loadInverse(mOutGlop->transform.canvas);
630            shaderMatrix.multiply(mOutGlop->transform.modelView);
631        } else {
632            shaderMatrix = mOutGlop->transform.modelView;
633        }
634        SkiaShader::store(mCaches, *mShader, shaderMatrix,
635                &textureUnit, &mDescription, &(mOutGlop->fill.skiaShaderData));
636    }
637
638    // duplicates ProgramCache's definition of color uniform presence
639    const bool singleColor = !mDescription.hasTexture
640            && !mDescription.hasExternalTexture
641            && !mDescription.hasGradient
642            && !mDescription.hasBitmap;
643    mOutGlop->fill.colorEnabled = mDescription.modulate || singleColor;
644
645    verify(mDescription, *mOutGlop);
646
647    // Final step: populate program and map bounds into render target space
648    mOutGlop->fill.program = mCaches.programCache.get(mDescription);
649}
650
651void GlopBuilder::dump(const Glop& glop) {
652    ALOGD("Glop Mesh");
653    const Glop::Mesh& mesh = glop.mesh;
654    ALOGD("    primitive mode: %d", mesh.primitiveMode);
655    ALOGD("    indices: buffer obj %x, indices %p", mesh.indices.bufferObject, mesh.indices.indices);
656
657    const Glop::Mesh::Vertices& vertices = glop.mesh.vertices;
658    ALOGD("    vertices: buffer obj %x, flags %x, pos %p, tex %p, clr %p, stride %d",
659            vertices.bufferObject, vertices.attribFlags,
660            vertices.position, vertices.texCoord, vertices.color, vertices.stride);
661    ALOGD("    element count: %d", mesh.elementCount);
662
663    ALOGD("Glop Fill");
664    const Glop::Fill& fill = glop.fill;
665    ALOGD("    program %p", fill.program);
666    if (fill.texture.texture) {
667        ALOGD("    texture %p, target %d, filter %d, clamp %d",
668                fill.texture.texture, fill.texture.texture->target(),
669                fill.texture.filter, fill.texture.clamp);
670        if (fill.texture.textureTransform) {
671            fill.texture.textureTransform->dump("texture transform");
672        }
673    }
674    ALOGD_IF(fill.colorEnabled, "    color (argb) %.2f %.2f %.2f %.2f",
675            fill.color.a, fill.color.r, fill.color.g, fill.color.b);
676    ALOGD_IF(fill.filterMode != ProgramDescription::ColorFilterMode::None,
677            "    filterMode %d", (int)fill.filterMode);
678    ALOGD_IF(fill.skiaShaderData.skiaShaderType, "    shader type %d",
679            fill.skiaShaderData.skiaShaderType);
680
681    ALOGD("Glop transform");
682    glop.transform.modelView.dump("  model view");
683    glop.transform.canvas.dump("  canvas");
684    ALOGD_IF(glop.transform.transformFlags, "  transformFlags 0x%x", glop.transform.transformFlags);
685
686    ALOGD_IF(glop.roundRectClipState, "Glop RRCS %p", glop.roundRectClipState);
687
688    ALOGD("Glop blend %d %d", glop.blend.src, glop.blend.dst);
689}
690
691} /* namespace uirenderer */
692} /* namespace android */
693