void copy_val(int a[], int n, int m)
{
int i;
for(i = 0; i < n; i++)
a[i] = random_val(m);
}
/*
* gen_vals - Generate the integer values we'll use to test a function
*/
static int gen_vals(int test_vals[], int min, int max, int test_range, int arg)
{
int i;
int test_count = 0;
/* Special case: If the user has specified a specific function
argument using the -1, -2, or -3 flags, then simply use this
argument and return */
if (has_arg[arg]) {
test_vals[0] = argval[arg];
return 1;
}
/*
* Special case: Generate test vals for floating point functions
* where the input argument is an unsigned bit-level
* representation of a float. For this case we want to test the
* regions around zero, the smallest normalized and largest
* denormalized numbers, one, and the largest normalized number,
* as well as inf and nan.
*/
if ((min == 1 && max == 1)) {
unsigned smallest_norm = 0x00800000;
unsigned one = 0x3f800000;
unsigned largest_norm = 0x7f000000;
unsigned inf = 0x7f800000;
unsigned nan = 0x7fc00000;
unsigned sign = 0x80000000;
/* Test range should be at most 1/2 the range of one exponent
value */
if (test_range > (1 << 23)) {
test_range = 1 << 23;
}
/* Functions where the input argument is an unsigned bit-level
representation of a float. The number of tests generated
inside this loop body is the value k referenced in the
comment for the global variable MAX_TEST_VALS. */
for (i = 0; i < test_range; i++) {
/* Denorms around zero */
test_vals[test_count++] = i;
test_vals[test_count++] = sign | i;
/* Region around norm to denorm transition */
test_vals[test_count++] = smallest_norm + i;
test_vals[test_count++] = smallest_norm - i;
test_vals[test_count++] = sign | (smallest_norm + i);
test_vals[test_count++] = sign | (smallest_norm - i);
/* Region around one */
test_vals[test_count++] = one + i;
test_vals[test_count++] = one - i;
test_vals[test_count++] = sign | (one + i);
test_vals[test_count++] = sign | (one - i);
/* Region below largest norm */
test_vals[test_count++] = largest_norm - i;
test_vals[test_count++] = sign | (largest_norm - i);
}
/* special vals */
test_vals[test_count++] = inf; /* inf */
test_vals[test_count++] = sign | inf; /* -inf */
test_vals[test_count++] = nan; /* nan */
test_vals[test_count++] = sign | nan; /* -nan */
return test_count;
}
/*
* Normal case: Generate test vals for integer functions
*/
/* If the range is small enough, then do exhaustively */
if (max - MAX_TEST_VALS <= min) {
for (i = min; i <= max; i++)
test_vals[test_count++] = i;
return test_count;
}
/* Otherwise, need to sample. Do so near the boundaries, around
zero, and for some random cases. */
for (i = 0; i < test_range; i++) {
/* Test around the boundaries */
test_vals[test_count++] = min + i;
test_vals[test_count++] = max - i;
/* If zero falls between min and max, then also test around zero */
if (i >= min && i <= max)
test_vals[test_count++] = i;
if (-i >= min && -i <= max)
test_vals[test_count++] = -i;
/* Random case between min and max */
test_vals[test_count++] = random_val(min, max);
}
return test_count;
}
bool GrGpuGLShaders::programUnitTest() {
GrGLProgram::GLSLVersion glslVersion =
get_glsl_version(this->glBinding(), this->glInterface());
static const int STAGE_OPTS[] = {
0,
StageDesc::kNoPerspective_OptFlagBit,
StageDesc::kIdentity_CoordMapping
};
GrGLProgram program;
ProgramDesc& pdesc = program.fProgramDesc;
static const int NUM_TESTS = 512;
// GrRandoms nextU() values have patterns in the low bits
// So using nextU() % array_count might never take some values.
GrRandom random;
for (int t = 0; t < NUM_TESTS; ++t) {
#if 0
GrPrintf("\nTest Program %d\n-------------\n", t);
static const int stop = -1;
if (t == stop) {
int breakpointhere = 9;
}
#endif
pdesc.fVertexLayout = 0;
pdesc.fEmitsPointSize = random.nextF() > .5f;
pdesc.fColorType = static_cast<int>(random.nextF() *
ProgramDesc::kColorTypeCnt);
int idx = (int)(random.nextF() * (SkXfermode::kCoeffModesCnt));
pdesc.fColorFilterXfermode = (SkXfermode::Mode)idx;
idx = (int)(random.nextF() * (GrDrawState::kNumStages + 1));
pdesc.fFirstCoverageStage = idx;
pdesc.fVertexLayout |= (random.nextF() > .5f) ?
GrDrawTarget::kCoverage_VertexLayoutBit :
0;
#if GR_GL_EXPERIMENTAL_GS
pdesc.fExperimentalGS = this->getCaps().fGeometryShaderSupport &&
random.nextF() > .5f;
#endif
bool edgeAA = random.nextF() > .5f;
if (edgeAA) {
bool vertexEdgeAA = random.nextF() > .5f;
if (vertexEdgeAA) {
pdesc.fVertexLayout |= GrDrawTarget::kEdge_VertexLayoutBit;
if (this->getCaps().fShaderDerivativeSupport) {
pdesc.fVertexEdgeType = random.nextF() > 0.5f ?
GrDrawState::kHairQuad_EdgeType :
GrDrawState::kHairLine_EdgeType;
} else {
pdesc.fVertexEdgeType = GrDrawState::kHairLine_EdgeType;
}
pdesc.fEdgeAANumEdges = 0;
} else {
pdesc.fEdgeAANumEdges = static_cast<int>(1 + random.nextF() *
this->getMaxEdges());
pdesc.fEdgeAAConcave = random.nextF() > .5f;
}
} else {
pdesc.fEdgeAANumEdges = 0;
}
if (this->getCaps().fDualSourceBlendingSupport) {
pdesc.fDualSrcOutput =
(ProgramDesc::DualSrcOutput)
(int)(random.nextF() * ProgramDesc::kDualSrcOutputCnt);
} else {
pdesc.fDualSrcOutput = ProgramDesc::kNone_DualSrcOutput;
}
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
// enable the stage?
if (random.nextF() > .5f) {
// use separate tex coords?
if (random.nextF() > .5f) {
int t = (int)(random.nextF() * GrDrawState::kMaxTexCoords);
pdesc.fVertexLayout |= StageTexCoordVertexLayoutBit(s, t);
} else {
pdesc.fVertexLayout |= StagePosAsTexCoordVertexLayoutBit(s);
}
}
// use text-formatted verts?
if (random.nextF() > .5f) {
pdesc.fVertexLayout |= kTextFormat_VertexLayoutBit;
}
idx = (int)(random.nextF() * GR_ARRAY_COUNT(STAGE_OPTS));
StageDesc& stage = pdesc.fStages[s];
stage.fOptFlags = STAGE_OPTS[idx];
stage.fModulation = random_val(&random, StageDesc::kModulationCnt);
stage.fCoordMapping = random_val(&random, StageDesc::kCoordMappingCnt);
stage.fFetchMode = random_val(&random, StageDesc::kFetchModeCnt);
// convolution shaders don't work with persp tex matrix
if (stage.fFetchMode == StageDesc::kConvolution_FetchMode) {
stage.fOptFlags |= StageDesc::kNoPerspective_OptFlagBit;
}
stage.setEnabled(VertexUsesStage(s, pdesc.fVertexLayout));
stage.fKernelWidth = static_cast<int8_t>(4 * random.nextF() + 2);
}
CachedData cachedData;
if (!program.genProgram(this->glInterface(),
glslVersion,
&cachedData)) {
return false;
}
DeleteProgram(this->glInterface(), &cachedData);
}
return true;
}
