GLProgramsTest.cpp revision 4324c3ba707a567d45628b80073c2e44d2d0e4e4 
1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9// This is a GPU-backend specific test. It relies on static intializers to work
10
11#include "SkTypes.h"
12
13#if SK_SUPPORT_GPU && SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
14
15#include "GrBackendEffectFactory.h"
16#include "GrContextFactory.h"
17#include "GrDrawEffect.h"
18#include "effects/GrConfigConversionEffect.h"
19#include "gl/GrGpuGL.h"
20
21#include "SkChecksum.h"
22#include "SkRandom.h"
23#include "Test.h"
24
25void GrGLProgramDesc::setRandom(SkRandom* random,
26                                const GrGpuGL* gpu,
27                                const GrRenderTarget* dstRenderTarget,
28                                const GrTexture* dstCopyTexture,
29                                const GrEffectStage* stages[],
30                                int numColorStages,
31                                int numCoverageStages,
32                                int currAttribIndex) {
33    int numEffects = numColorStages + numCoverageStages;
34    size_t keyLength = KeyLength(numEffects);
35    fKey.reset(keyLength);
36    *this->atOffset<uint32_t, kLengthOffset>() = static_cast<uint32_t>(keyLength);
37    memset(this->header(), 0, kHeaderSize);
38
39    KeyHeader* header = this->header();
40    header->fEmitsPointSize = random->nextBool();
41
42    header->fPositionAttributeIndex = 0;
43
44    // if the effects have used up all off the available attributes,
45    // don't try to use color or coverage attributes as input
46    do {
47        header->fColorInput = static_cast<GrGLProgramDesc::ColorInput>(
48                                  random->nextULessThan(kColorInputCnt));
49    } while (GrDrawState::kMaxVertexAttribCnt <= currAttribIndex &&
50             kAttribute_ColorInput == header->fColorInput);
51    header->fColorAttributeIndex = (header->fColorInput == kAttribute_ColorInput) ?
52                                        currAttribIndex++ :
53                                        -1;
54
55    do {
56        header->fCoverageInput = static_cast<GrGLProgramDesc::ColorInput>(
57                                     random->nextULessThan(kColorInputCnt));
58    } while (GrDrawState::kMaxVertexAttribCnt <= currAttribIndex  &&
59             kAttribute_ColorInput == header->fCoverageInput);
60    header->fCoverageAttributeIndex = (header->fCoverageInput == kAttribute_ColorInput) ?
61                                        currAttribIndex++ :
62                                        -1;
63
64#if GR_GL_EXPERIMENTAL_GS
65    header->fExperimentalGS = gpu->caps()->geometryShaderSupport() && random->nextBool();
66#endif
67
68    bool useLocalCoords = random->nextBool() && currAttribIndex < GrDrawState::kMaxVertexAttribCnt;
69    header->fLocalCoordAttributeIndex = useLocalCoords ? currAttribIndex++ : -1;
70
71    header->fColorEffectCnt = numColorStages;
72    header->fCoverageEffectCnt = numCoverageStages;
73
74    bool dstRead = false;
75    bool fragPos = false;
76    bool vertexCode = false;
77    int numStages = numColorStages + numCoverageStages;
78    for (int s = 0; s < numStages; ++s) {
79        const GrBackendEffectFactory& factory = (*stages[s]->getEffect())->getFactory();
80        GrDrawEffect drawEffect(*stages[s], useLocalCoords);
81        this->effectKeys()[s] = factory.glEffectKey(drawEffect, gpu->glCaps());
82        if ((*stages[s]->getEffect())->willReadDstColor()) {
83            dstRead = true;
84        }
85        if ((*stages[s]->getEffect())->willReadFragmentPosition()) {
86            fragPos = true;
87        }
88        if ((*stages[s]->getEffect())->hasVertexCode()) {
89            vertexCode = true;
90        }
91    }
92
93    if (dstRead) {
94        header->fDstReadKey = GrGLShaderBuilder::KeyForDstRead(dstCopyTexture, gpu->glCaps());
95    } else {
96        header->fDstReadKey = 0;
97    }
98    if (fragPos) {
99        header->fFragPosKey = GrGLShaderBuilder::KeyForFragmentPosition(dstRenderTarget,
100                                                                         gpu->glCaps());
101    } else {
102        header->fFragPosKey = 0;
103    }
104
105    header->fHasVertexCode = vertexCode ||
106                             useLocalCoords ||
107                             kAttribute_ColorInput == header->fColorInput ||
108                             kAttribute_ColorInput == header->fCoverageInput;
109
110    CoverageOutput coverageOutput;
111    bool illegalCoverageOutput;
112    do {
113        coverageOutput = static_cast<CoverageOutput>(random->nextULessThan(kCoverageOutputCnt));
114        illegalCoverageOutput = (!gpu->caps()->dualSourceBlendingSupport() &&
115                                 CoverageOutputUsesSecondaryOutput(coverageOutput)) ||
116                                (!dstRead && kCombineWithDst_CoverageOutput == coverageOutput);
117    } while (illegalCoverageOutput);
118
119    header->fCoverageOutput = coverageOutput;
120
121    *this->checksum() = 0;
122    *this->checksum() = SkChecksum::Compute(reinterpret_cast<uint32_t*>(fKey.get()), keyLength);
123    fInitialized = true;
124}
125
126bool GrGpuGL::programUnitTest(int maxStages) {
127
128    GrTextureDesc dummyDesc;
129    dummyDesc.fFlags = kRenderTarget_GrTextureFlagBit;
130    dummyDesc.fConfig = kSkia8888_GrPixelConfig;
131    dummyDesc.fWidth = 34;
132    dummyDesc.fHeight = 18;
133    SkAutoTUnref<GrTexture> dummyTexture1(this->createTexture(dummyDesc, NULL, 0));
134    dummyDesc.fFlags = kNone_GrTextureFlags;
135    dummyDesc.fConfig = kAlpha_8_GrPixelConfig;
136    dummyDesc.fWidth = 16;
137    dummyDesc.fHeight = 22;
138    SkAutoTUnref<GrTexture> dummyTexture2(this->createTexture(dummyDesc, NULL, 0));
139
140    static const int NUM_TESTS = 512;
141
142    SkRandom random;
143    for (int t = 0; t < NUM_TESTS; ++t) {
144
145#if 0
146        GrPrintf("\nTest Program %d\n-------------\n", t);
147        static const int stop = -1;
148        if (t == stop) {
149            int breakpointhere = 9;
150        }
151#endif
152
153        GrGLProgramDesc pdesc;
154
155        int currAttribIndex = 1;  // we need to always leave room for position
156        int currTextureCoordSet = 0;
157        int attribIndices[2] = { 0, 0 };
158        GrTexture* dummyTextures[] = {dummyTexture1.get(), dummyTexture2.get()};
159
160        int numStages = random.nextULessThan(maxStages + 1);
161        int numColorStages = random.nextULessThan(numStages + 1);
162        int numCoverageStages = numStages - numColorStages;
163
164        SkAutoSTMalloc<8, const GrEffectStage*> stages(numStages);
165
166        bool useFixedFunctionTexturing = this->shouldUseFixedFunctionTexturing();
167
168        for (int s = 0; s < numStages;) {
169            SkAutoTUnref<const GrEffectRef> effect(GrEffectTestFactory::CreateStage(
170                                                                            &random,
171                                                                            this->getContext(),
172                                                                            *this->caps(),
173                                                                            dummyTextures));
174            SkASSERT(effect);
175            int numAttribs = (*effect)->numVertexAttribs();
176
177            // If adding this effect would exceed the max attrib count then generate a
178            // new random effect.
179            if (currAttribIndex + numAttribs > GrDrawState::kMaxVertexAttribCnt) {
180                continue;
181            }
182
183
184            // If adding this effect would exceed the max texture coord set count then generate a
185            // new random effect.
186            if (useFixedFunctionTexturing && !(*effect)->hasVertexCode()) {
187                int numTransforms = (*effect)->numTransforms();
188                if (currTextureCoordSet + numTransforms > this->glCaps().maxFixedFunctionTextureCoords()) {
189                    continue;
190                }
191                currTextureCoordSet += numTransforms;
192            }
193
194            useFixedFunctionTexturing = useFixedFunctionTexturing && !(*effect)->hasVertexCode();
195
196            for (int i = 0; i < numAttribs; ++i) {
197                attribIndices[i] = currAttribIndex++;
198            }
199            GrEffectStage* stage = SkNEW_ARGS(GrEffectStage,
200                                              (effect.get(), attribIndices[0], attribIndices[1]));
201            stages[s] = stage;
202            ++s;
203        }
204        const GrTexture* dstTexture = random.nextBool() ? dummyTextures[0] : dummyTextures[1];
205        pdesc.setRandom(&random,
206                        this,
207                        dummyTextures[0]->asRenderTarget(),
208                        dstTexture,
209                        stages.get(),
210                        numColorStages,
211                        numCoverageStages,
212                        currAttribIndex);
213
214        SkAutoTUnref<GrGLProgram> program(GrGLProgram::Create(this,
215                                                              pdesc,
216                                                              stages,
217                                                              stages + numColorStages));
218        for (int s = 0; s < numStages; ++s) {
219            SkDELETE(stages[s]);
220        }
221        if (NULL == program.get()) {
222            return false;
223        }
224    }
225    return true;
226}
227
228DEF_GPUTEST(GLPrograms, reporter, factory) {
229    for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
230        GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(type));
231        if (NULL != context) {
232            GrGpuGL* gpu = static_cast<GrGpuGL*>(context->getGpu());
233            int maxStages = 6;
234#if SK_ANGLE
235            // Some long shaders run out of temporary registers in the D3D compiler on ANGLE.
236            if (type == GrContextFactory::kANGLE_GLContextType) {
237                maxStages = 3;
238            }
239#endif
240            REPORTER_ASSERT(reporter, gpu->programUnitTest(maxStages));
241        }
242    }
243}
244
245// This is evil evil evil. The linker may throw away whole translation units as dead code if it
246// thinks none of the functions are called. It will do this even if there are static initializers
247// in the unit that could pass pointers to functions from the unit out to other translation units!
248// We force some of the effects that would otherwise be discarded to link here.
249
250#include "SkAlphaThresholdFilter.h"
251#include "SkColorMatrixFilter.h"
252#include "SkLightingImageFilter.h"
253#include "SkMagnifierImageFilter.h"
254
255void forceLinking();
256
257void forceLinking() {
258    SkLightingImageFilter::CreateDistantLitDiffuse(SkPoint3(0,0,0), 0, 0, 0);
259    SkAlphaThresholdFilter::Create(SkRegion(), .5f, .5f);
260    SkMagnifierImageFilter mag(SkRect::MakeWH(SK_Scalar1, SK_Scalar1), SK_Scalar1);
261    GrConfigConversionEffect::Create(NULL,
262                                     false,
263                                     GrConfigConversionEffect::kNone_PMConversion,
264                                     SkMatrix::I());
265    SkScalar matrix[20];
266    SkAutoTUnref<SkColorMatrixFilter> cmf(SkColorMatrixFilter::Create(matrix));
267}
268
269#endif
270