void setData(const GrGLSLProgramDataManager& pdman,
const GrPrimitiveProcessor& gp,
FPCoordTransformIter&& transformIter) override {
const DefaultGeoProc& dgp = gp.cast<DefaultGeoProc>();
if (!dgp.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dgp.viewMatrix())) {
fViewMatrix = dgp.viewMatrix();
float viewMatrix[3 * 3];
GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix);
pdman.setMatrix3f(fViewMatrixUniform, viewMatrix);
}
if (dgp.color() != fColor && !dgp.hasVertexColor()) {
float c[4];
GrColorToRGBAFloat(dgp.color(), c);
pdman.set4fv(fColorUniform, 1, c);
fColor = dgp.color();
}
if (dgp.coverage() != fCoverage && !dgp.hasVertexCoverage()) {
pdman.set1f(fCoverageUniform, GrNormalizeByteToFloat(dgp.coverage()));
fCoverage = dgp.coverage();
}
this->setTransformDataHelper(dgp.fLocalMatrix, pdman, &transformIter);
if (dgp.linearizeColor() && dgp.fColorSpaceXform) {
fColorSpaceHelper.setData(pdman, dgp.fColorSpaceXform.get());
}
}
virtual void setData(const GrGLProgramDataManager& pdman,
const GrPrimitiveProcessor& gp,
const GrBatchTracker& bt) override {
const DefaultGeoProc& dgp = gp.cast<DefaultGeoProc>();
if (!dgp.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(dgp.viewMatrix())) {
fViewMatrix = dgp.viewMatrix();
GrGLfloat viewMatrix[3 * 3];
GrGLGetMatrix<3>(viewMatrix, fViewMatrix);
pdman.setMatrix3f(fViewMatrixUniform, viewMatrix);
}
if (dgp.color() != fColor && !dgp.hasVertexColor()) {
GrGLfloat c[4];
GrColorToRGBAFloat(dgp.color(), c);
pdman.set4fv(fColorUniform, 1, c);
fColor = dgp.color();
}
if (!dgp.coverageWillBeIgnored() &&
dgp.coverage() != fCoverage && !dgp.hasVertexCoverage()) {
pdman.set1f(fCoverageUniform, GrNormalizeByteToFloat(dgp.coverage()));
fCoverage = dgp.coverage();
}
}
virtual void setData(const GrGLProgramDataManager& pdman,
const GrPrimitiveProcessor& primProc,
const GrBatchTracker& bt) override {
const GrConicEffect& ce = primProc.cast<GrConicEffect>();
this->setUniformViewMatrix(pdman, ce.viewMatrix());
const ConicBatchTracker& local = bt.cast<ConicBatchTracker>();
if (kUniform_GrGPInput == local.fInputColorType && local.fColor != fColor) {
GrGLfloat c[4];
GrColorToRGBAFloat(local.fColor, c);
pdman.set4fv(fColorUniform, 1, c);
fColor = local.fColor;
}
if (0xff != local.fCoverageScale && fCoverageScale != local.fCoverageScale) {
pdman.set1f(fCoverageScaleUniform, GrNormalizeByteToFloat(local.fCoverageScale));
fCoverageScale = local.fCoverageScale;
}
}
static void add_line(const SkPoint p[2],
const SkMatrix* toSrc,
uint8_t coverage,
LineVertex** vert) {
const SkPoint& a = p[0];
const SkPoint& b = p[1];
SkVector ortho, vec = b;
vec -= a;
if (vec.setLength(SK_ScalarHalf)) {
// Create a vector orthogonal to 'vec' and of unit length
ortho.fX = 2.0f * vec.fY;
ortho.fY = -2.0f * vec.fX;
float floatCoverage = GrNormalizeByteToFloat(coverage);
(*vert)[0].fPos = a;
(*vert)[0].fCoverage = floatCoverage;
(*vert)[1].fPos = b;
(*vert)[1].fCoverage = floatCoverage;
(*vert)[2].fPos = a - vec + ortho;
(*vert)[2].fCoverage = 0;
(*vert)[3].fPos = b + vec + ortho;
(*vert)[3].fCoverage = 0;
(*vert)[4].fPos = a - vec - ortho;
(*vert)[4].fCoverage = 0;
(*vert)[5].fPos = b + vec - ortho;
(*vert)[5].fCoverage = 0;
if (toSrc) {
toSrc->mapPointsWithStride(&(*vert)->fPos,
sizeof(LineVertex),
kLineSegNumVertices);
}
} else {
// just make it degenerate and likely offscreen
for (int i = 0; i < kLineSegNumVertices; ++i) {
(*vert)[i].fPos.set(SK_ScalarMax, SK_ScalarMax);
}
}
*vert += kLineSegNumVertices;
}
void GrGLProgram::setCoverage(const GrOptDrawState& optState, uint8_t coverage) {
const GrProgramDesc::KeyHeader& header = fDesc.header();
switch (header.fCoverageInput) {
case GrProgramDesc::kAttribute_ColorInput:
// Attribute case is handled in GrGpuGL::setupGeometry
break;
case GrProgramDesc::kUniform_ColorInput:
if (fCoverage != coverage) {
// OpenGL ES doesn't support unsigned byte varieties of glUniform
GrGLfloat c = GrNormalizeByteToFloat(coverage);
fProgramDataManager.set1f(fBuiltinUniformHandles.fCoverageUni, c);
fCoverage = coverage;
}
break;
case GrProgramDesc::kAllOnes_ColorInput:
// Handled by shader creation
break;
default:
SkFAIL("Unexpected coverage type.");
}
}
void setData(const GrGLSLProgramDataManager& pdman,
const GrPrimitiveProcessor& primProc) override {
const GrQuadEffect& qe = primProc.cast<GrQuadEffect>();
if (!qe.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(qe.viewMatrix())) {
fViewMatrix = qe.viewMatrix();
float viewMatrix[3 * 3];
GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix);
pdman.setMatrix3f(fViewMatrixUniform, viewMatrix);
}
if (qe.color() != fColor) {
float c[4];
GrColorToRGBAFloat(qe.color(), c);
pdman.set4fv(fColorUniform, 1, c);
fColor = qe.color();
}
if (qe.coverageScale() != 0xff && qe.coverageScale() != fCoverageScale) {
pdman.set1f(fCoverageScaleUniform, GrNormalizeByteToFloat(qe.coverageScale()));
fCoverageScale = qe.coverageScale();
}
}
void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& primProc,
FPCoordTransformIter&& transformIter) override {
const GrConicEffect& ce = primProc.cast<GrConicEffect>();
if (!ce.viewMatrix().isIdentity() && !fViewMatrix.cheapEqualTo(ce.viewMatrix())) {
fViewMatrix = ce.viewMatrix();
float viewMatrix[3 * 3];
GrGLSLGetMatrix<3>(viewMatrix, fViewMatrix);
pdman.setMatrix3f(fViewMatrixUniform, viewMatrix);
}
if (ce.color() != fColor) {
float c[4];
GrColorToRGBAFloat(ce.color(), c);
pdman.set4fv(fColorUniform, 1, c);
fColor = ce.color();
}
if (ce.coverageScale() != 0xff && ce.coverageScale() != fCoverageScale) {
pdman.set1f(fCoverageScaleUniform, GrNormalizeByteToFloat(ce.coverageScale()));
fCoverageScale = ce.coverageScale();
}
this->setTransformDataHelper(ce.localMatrix(), pdman, &transformIter);
}
void GrAARectRenderer::geometryStrokeAARect(GrDrawTarget* target,
GrDrawState* drawState,
GrColor color,
const SkRect& devOutside,
const SkRect& devOutsideAssist,
const SkRect& devInside,
bool miterStroke) {
GrDrawState::AutoRestoreEffects are(drawState);
CoverageAttribType type;
SkAutoTUnref<const GrGeometryProcessor> gp(create_rect_gp(*drawState, color, &type));
int innerVertexNum = 4;
int outerVertexNum = miterStroke ? 4 : 8;
int totalVertexNum = (outerVertexNum + innerVertexNum) * 2;
size_t vstride = gp->getVertexStride();
GrDrawTarget::AutoReleaseGeometry geo(target, totalVertexNum, vstride, 0);
if (!geo.succeeded()) {
SkDebugf("Failed to get space for vertices!\n");
return;
}
GrIndexBuffer* indexBuffer = this->aaStrokeRectIndexBuffer(miterStroke);
if (NULL == indexBuffer) {
SkDebugf("Failed to create index buffer!\n");
return;
}
intptr_t verts = reinterpret_cast<intptr_t>(geo.vertices());
// We create vertices for four nested rectangles. There are two ramps from 0 to full
// coverage, one on the exterior of the stroke and the other on the interior.
// The following pointers refer to the four rects, from outermost to innermost.
SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + outerVertexNum * vstride);
SkPoint* fan2Pos = reinterpret_cast<SkPoint*>(verts + 2 * outerVertexNum * vstride);
SkPoint* fan3Pos = reinterpret_cast<SkPoint*>(verts + (2 * outerVertexNum + innerVertexNum) * vstride);
#ifndef SK_IGNORE_THIN_STROKED_RECT_FIX
// TODO: this only really works if the X & Y margins are the same all around
// the rect (or if they are all >= 1.0).
SkScalar inset = SkMinScalar(SK_Scalar1, devOutside.fRight - devInside.fRight);
inset = SkMinScalar(inset, devInside.fLeft - devOutside.fLeft);
inset = SkMinScalar(inset, devInside.fTop - devOutside.fTop);
if (miterStroke) {
inset = SK_ScalarHalf * SkMinScalar(inset, devOutside.fBottom - devInside.fBottom);
} else {
inset = SK_ScalarHalf * SkMinScalar(inset, devOutsideAssist.fBottom - devInside.fBottom);
}
SkASSERT(inset >= 0);
#else
SkScalar inset = SK_ScalarHalf;
#endif
if (miterStroke) {
// outermost
set_inset_fan(fan0Pos, vstride, devOutside, -SK_ScalarHalf, -SK_ScalarHalf);
// inner two
set_inset_fan(fan1Pos, vstride, devOutside, inset, inset);
set_inset_fan(fan2Pos, vstride, devInside, -inset, -inset);
// innermost
set_inset_fan(fan3Pos, vstride, devInside, SK_ScalarHalf, SK_ScalarHalf);
} else {
SkPoint* fan0AssistPos = reinterpret_cast<SkPoint*>(verts + 4 * vstride);
SkPoint* fan1AssistPos = reinterpret_cast<SkPoint*>(verts + (outerVertexNum + 4) * vstride);
// outermost
set_inset_fan(fan0Pos, vstride, devOutside, -SK_ScalarHalf, -SK_ScalarHalf);
set_inset_fan(fan0AssistPos, vstride, devOutsideAssist, -SK_ScalarHalf, -SK_ScalarHalf);
// outer one of the inner two
set_inset_fan(fan1Pos, vstride, devOutside, inset, inset);
set_inset_fan(fan1AssistPos, vstride, devOutsideAssist, inset, inset);
// inner one of the inner two
set_inset_fan(fan2Pos, vstride, devInside, -inset, -inset);
// innermost
set_inset_fan(fan3Pos, vstride, devInside, SK_ScalarHalf, SK_ScalarHalf);
}
// Make verts point to vertex color and then set all the color and coverage vertex attrs values.
// The outermost rect has 0 coverage
verts += sizeof(SkPoint);
for (int i = 0; i < outerVertexNum; ++i) {
if (kUseCoverage_CoverageAttribType == type) {
*reinterpret_cast<GrColor*>(verts + i * vstride) = color;
*reinterpret_cast<float*>(verts + i * vstride + sizeof(GrColor)) = 0;
} else {
*reinterpret_cast<GrColor*>(verts + i * vstride) = 0;
}
}
// scale is the coverage for the the inner two rects.
int scale;
if (inset < SK_ScalarHalf) {
scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf));
SkASSERT(scale >= 0 && scale <= 255);
} else {
scale = 0xff;
}
float innerCoverage = GrNormalizeByteToFloat(scale);
GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale);
verts += outerVertexNum * vstride;
for (int i = 0; i < outerVertexNum + innerVertexNum; ++i) {
if (kUseCoverage_CoverageAttribType == type) {
*reinterpret_cast<GrColor*>(verts + i * vstride) = color;
*reinterpret_cast<float*>(verts + i * vstride + sizeof(GrColor)) = innerCoverage;
} else {
*reinterpret_cast<GrColor*>(verts + i * vstride) = scaledColor;
}
}
// The innermost rect has 0 coverage
verts += (outerVertexNum + innerVertexNum) * vstride;
for (int i = 0; i < innerVertexNum; ++i) {
if (kUseCoverage_CoverageAttribType == type) {
*reinterpret_cast<GrColor*>(verts + i * vstride) = color;
*reinterpret_cast<GrColor*>(verts + i * vstride + sizeof(GrColor)) = 0;
} else {
*reinterpret_cast<GrColor*>(verts + i * vstride) = 0;
}
}
target->setIndexSourceToBuffer(indexBuffer);
target->drawIndexedInstances(drawState,
gp,
kTriangles_GrPrimitiveType,
1,
totalVertexNum,
aa_stroke_rect_index_count(miterStroke));
target->resetIndexSource();
}
void GrAARectRenderer::geometryFillAARect(GrDrawTarget* target,
GrDrawState* drawState,
GrColor color,
const SkRect& rect,
const SkMatrix& combinedMatrix,
const SkRect& devRect) {
GrDrawState::AutoRestoreEffects are(drawState);
CoverageAttribType type;
SkAutoTUnref<const GrGeometryProcessor> gp(create_rect_gp(*drawState, color, &type));
size_t vertexStride = gp->getVertexStride();
GrDrawTarget::AutoReleaseGeometry geo(target, 8, vertexStride, 0);
if (!geo.succeeded()) {
SkDebugf("Failed to get space for vertices!\n");
return;
}
if (NULL == fAAFillRectIndexBuffer) {
fAAFillRectIndexBuffer = fGpu->createInstancedIndexBuffer(gFillAARectIdx,
kIndicesPerAAFillRect,
kNumAAFillRectsInIndexBuffer,
kVertsPerAAFillRect);
}
GrIndexBuffer* indexBuffer = fAAFillRectIndexBuffer;
if (NULL == indexBuffer) {
SkDebugf("Failed to create index buffer!\n");
return;
}
intptr_t verts = reinterpret_cast<intptr_t>(geo.vertices());
SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride);
SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1);
inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
if (combinedMatrix.rectStaysRect()) {
// Temporarily #if'ed out. We don't want to pass in the devRect but
// right now it is computed in GrContext::apply_aa_to_rect and we don't
// want to throw away the work
#if 0
SkRect devRect;
combinedMatrix.mapRect(&devRect, rect);
#endif
set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_ScalarHalf);
set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset);
} else {
// compute transformed (1, 0) and (0, 1) vectors
SkVector vec[2] = {
{ combinedMatrix[SkMatrix::kMScaleX], combinedMatrix[SkMatrix::kMSkewY] },
{ combinedMatrix[SkMatrix::kMSkewX], combinedMatrix[SkMatrix::kMScaleY] }
};
vec[0].normalize();
vec[0].scale(SK_ScalarHalf);
vec[1].normalize();
vec[1].scale(SK_ScalarHalf);
// create the rotated rect
fan0Pos->setRectFan(rect.fLeft, rect.fTop,
rect.fRight, rect.fBottom, vertexStride);
combinedMatrix.mapPointsWithStride(fan0Pos, vertexStride, 4);
// Now create the inset points and then outset the original
// rotated points
// TL
*((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[1];
// BL
*((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[1];
// BR
*((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[1];
// TR
*((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[1];
}
// Make verts point to vertex color and then set all the color and coverage vertex attrs values.
verts += sizeof(SkPoint);
for (int i = 0; i < 4; ++i) {
if (kUseCoverage_CoverageAttribType == type) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) = 0;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
}
}
int scale;
if (inset < SK_ScalarHalf) {
scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf));
SkASSERT(scale >= 0 && scale <= 255);
} else {
scale = 0xff;
}
verts += 4 * vertexStride;
float innerCoverage = GrNormalizeByteToFloat(scale);
GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale);
for (int i = 0; i < 4; ++i) {
if (kUseCoverage_CoverageAttribType == type) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) = innerCoverage;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor;
}
}
target->setIndexSourceToBuffer(indexBuffer);
target->drawIndexedInstances(drawState,
gp,
kTriangles_GrPrimitiveType,
1,
kVertsPerAAFillRect,
kIndicesPerAAFillRect);
target->resetIndexSource();
}
static void generate_aa_fill_rect_geometry(intptr_t verts,
size_t vertexStride,
GrColor color,
const SkMatrix& viewMatrix,
const SkRect& rect,
const SkRect& devRect,
bool tweakAlphaForCoverage,
const SkMatrix* localMatrix) {
SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride);
SkScalar inset;
if (viewMatrix.rectStaysRect()) {
inset = SkMinScalar(devRect.width(), SK_Scalar1);
inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_ScalarHalf);
set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset);
} else {
// compute transformed (1, 0) and (0, 1) vectors
SkVector vec[2] = {{viewMatrix[SkMatrix::kMScaleX], viewMatrix[SkMatrix::kMSkewY]},
{viewMatrix[SkMatrix::kMSkewX], viewMatrix[SkMatrix::kMScaleY]}};
SkScalar len1 = SkPoint::Normalize(&vec[0]);
vec[0].scale(SK_ScalarHalf);
SkScalar len2 = SkPoint::Normalize(&vec[1]);
vec[1].scale(SK_ScalarHalf);
inset = SkMinScalar(len1 * rect.width(), SK_Scalar1);
inset = SK_ScalarHalf * SkMinScalar(inset, len2 * rect.height());
// create the rotated rect
SkPointPriv::SetRectFan(fan0Pos, rect.fLeft, rect.fTop, rect.fRight, rect.fBottom,
vertexStride);
SkMatrixPriv::MapPointsWithStride(viewMatrix, fan0Pos, vertexStride, 4);
// Now create the inset points and then outset the original
// rotated points
// TL
*((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[1];
// BL
*((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[1];
// BR
*((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[1];
// TR
*((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[1];
}
if (localMatrix) {
SkMatrix invViewMatrix;
if (!viewMatrix.invert(&invViewMatrix)) {
SkDebugf("View matrix is non-invertible, local coords will be wrong.");
invViewMatrix = SkMatrix::I();
}
SkMatrix localCoordMatrix;
localCoordMatrix.setConcat(*localMatrix, invViewMatrix);
SkPoint* fan0Loc = reinterpret_cast<SkPoint*>(verts + sizeof(SkPoint) + sizeof(GrColor));
SkMatrixPriv::MapPointsWithStride(localCoordMatrix, fan0Loc, vertexStride, fan0Pos,
vertexStride, 8);
}
// Make verts point to vertex color and then set all the color and coverage vertex attrs
// values.
verts += sizeof(SkPoint);
// The coverage offset is always the last vertex attribute
intptr_t coverageOffset = vertexStride - sizeof(GrColor) - sizeof(SkPoint);
for (int i = 0; i < 4; ++i) {
if (tweakAlphaForCoverage) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride + coverageOffset) = 0;
}
}
int scale;
if (inset < SK_ScalarHalf) {
scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf));
SkASSERT(scale >= 0 && scale <= 255);
} else {
scale = 0xff;
}
verts += 4 * vertexStride;
float innerCoverage = GrNormalizeByteToFloat(scale);
GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale);
for (int i = 0; i < 4; ++i) {
if (tweakAlphaForCoverage) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride + coverageOffset) = innerCoverage;
}
}
}
void generateAAStrokeRectGeometry(void* vertices,
size_t offset,
size_t vertexStride,
int outerVertexNum,
int innerVertexNum,
GrColor color,
const SkRect& devOutside,
const SkRect& devOutsideAssist,
const SkRect& devInside,
bool miterStroke,
bool tweakAlphaForCoverage) const {
intptr_t verts = reinterpret_cast<intptr_t>(vertices) + offset;
// We create vertices for four nested rectangles. There are two ramps from 0 to full
// coverage, one on the exterior of the stroke and the other on the interior.
// The following pointers refer to the four rects, from outermost to innermost.
SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + outerVertexNum * vertexStride);
SkPoint* fan2Pos = reinterpret_cast<SkPoint*>(verts + 2 * outerVertexNum * vertexStride);
SkPoint* fan3Pos = reinterpret_cast<SkPoint*>(verts +
(2 * outerVertexNum + innerVertexNum) *
vertexStride);
#ifndef SK_IGNORE_THIN_STROKED_RECT_FIX
// TODO: this only really works if the X & Y margins are the same all around
// the rect (or if they are all >= 1.0).
SkScalar inset = SkMinScalar(SK_Scalar1, devOutside.fRight - devInside.fRight);
inset = SkMinScalar(inset, devInside.fLeft - devOutside.fLeft);
inset = SkMinScalar(inset, devInside.fTop - devOutside.fTop);
if (miterStroke) {
inset = SK_ScalarHalf * SkMinScalar(inset, devOutside.fBottom - devInside.fBottom);
} else {
inset = SK_ScalarHalf * SkMinScalar(inset, devOutsideAssist.fBottom -
devInside.fBottom);
}
SkASSERT(inset >= 0);
#else
SkScalar inset = SK_ScalarHalf;
#endif
if (miterStroke) {
// outermost
set_inset_fan(fan0Pos, vertexStride, devOutside, -SK_ScalarHalf, -SK_ScalarHalf);
// inner two
set_inset_fan(fan1Pos, vertexStride, devOutside, inset, inset);
set_inset_fan(fan2Pos, vertexStride, devInside, -inset, -inset);
// innermost
set_inset_fan(fan3Pos, vertexStride, devInside, SK_ScalarHalf, SK_ScalarHalf);
} else {
SkPoint* fan0AssistPos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride);
SkPoint* fan1AssistPos = reinterpret_cast<SkPoint*>(verts +
(outerVertexNum + 4) *
vertexStride);
// outermost
set_inset_fan(fan0Pos, vertexStride, devOutside, -SK_ScalarHalf, -SK_ScalarHalf);
set_inset_fan(fan0AssistPos, vertexStride, devOutsideAssist, -SK_ScalarHalf,
-SK_ScalarHalf);
// outer one of the inner two
set_inset_fan(fan1Pos, vertexStride, devOutside, inset, inset);
set_inset_fan(fan1AssistPos, vertexStride, devOutsideAssist, inset, inset);
// inner one of the inner two
set_inset_fan(fan2Pos, vertexStride, devInside, -inset, -inset);
// innermost
set_inset_fan(fan3Pos, vertexStride, devInside, SK_ScalarHalf, SK_ScalarHalf);
}
// Make verts point to vertex color and then set all the color and coverage vertex attrs
// values. The outermost rect has 0 coverage
verts += sizeof(SkPoint);
for (int i = 0; i < outerVertexNum; ++i) {
if (tweakAlphaForCoverage) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) = 0;
}
}
// scale is the coverage for the the inner two rects.
int scale;
if (inset < SK_ScalarHalf) {
scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf));
SkASSERT(scale >= 0 && scale <= 255);
} else {
scale = 0xff;
}
float innerCoverage = GrNormalizeByteToFloat(scale);
GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale);
verts += outerVertexNum * vertexStride;
for (int i = 0; i < outerVertexNum + innerVertexNum; ++i) {
if (tweakAlphaForCoverage) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) =
innerCoverage;
}
}
// The innermost rect has 0 coverage
verts += (outerVertexNum + innerVertexNum) * vertexStride;
for (int i = 0; i < innerVertexNum; ++i) {
if (tweakAlphaForCoverage) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<GrColor*>(verts + i * vertexStride + sizeof(GrColor)) = 0;
}
}
}
void generateAAFillRectGeometry(void* vertices,
size_t offset,
size_t vertexStride,
GrColor color,
const SkMatrix& viewMatrix,
const SkRect& rect,
const SkRect& devRect,
bool tweakAlphaForCoverage) const {
intptr_t verts = reinterpret_cast<intptr_t>(vertices) + offset;
SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride);
SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1);
inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
if (viewMatrix.rectStaysRect()) {
set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_ScalarHalf);
set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset);
} else {
// compute transformed (1, 0) and (0, 1) vectors
SkVector vec[2] = {
{ viewMatrix[SkMatrix::kMScaleX], viewMatrix[SkMatrix::kMSkewY] },
{ viewMatrix[SkMatrix::kMSkewX], viewMatrix[SkMatrix::kMScaleY] }
};
vec[0].normalize();
vec[0].scale(SK_ScalarHalf);
vec[1].normalize();
vec[1].scale(SK_ScalarHalf);
// create the rotated rect
fan0Pos->setRectFan(rect.fLeft, rect.fTop,
rect.fRight, rect.fBottom, vertexStride);
viewMatrix.mapPointsWithStride(fan0Pos, vertexStride, 4);
// Now create the inset points and then outset the original
// rotated points
// TL
*((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[1];
// BL
*((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[1];
// BR
*((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[1];
// TR
*((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) =
*((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + vec[1];
*((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[1];
}
// Make verts point to vertex color and then set all the color and coverage vertex attrs
// values.
verts += sizeof(SkPoint);
for (int i = 0; i < 4; ++i) {
if (tweakAlphaForCoverage) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) = 0;
}
}
int scale;
if (inset < SK_ScalarHalf) {
scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf));
SkASSERT(scale >= 0 && scale <= 255);
} else {
scale = 0xff;
}
verts += 4 * vertexStride;
float innerCoverage = GrNormalizeByteToFloat(scale);
GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale);
for (int i = 0; i < 4; ++i) {
if (tweakAlphaForCoverage) {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor;
} else {
*reinterpret_cast<GrColor*>(verts + i * vertexStride) = color;
*reinterpret_cast<float*>(verts + i * vertexStride +
sizeof(GrColor)) = innerCoverage;
}
}
}
