void GrGpuGL::flushViewMatrix(DrawType type) {
const GrGLRenderTarget* rt = static_cast<const GrGLRenderTarget*>(this->getDrawState().getRenderTarget());
SkISize viewportSize;
const GrGLIRect& viewport = rt->getViewport();
viewportSize.set(viewport.fWidth, viewport.fHeight);
const GrMatrix& vm = this->getDrawState().getViewMatrix();
if (kStencilPath_DrawType == type) {
if (fHWPathMatrixState.fViewMatrix != vm ||
fHWPathMatrixState.fRTSize != viewportSize) {
// rescale the coords from skia's "device" coords to GL's normalized coords,
// and perform a y-flip.
GrMatrix m;
m.setScale(GrIntToScalar(2) / rt->width(), GrIntToScalar(-2) / rt->height());
m.postTranslate(-GR_Scalar1, GR_Scalar1);
m.preConcat(vm);
// GL wants a column-major 4x4.
GrGLfloat mv[] = {
// col 0
GrScalarToFloat(m[GrMatrix::kMScaleX]),
GrScalarToFloat(m[GrMatrix::kMSkewY]),
0,
GrScalarToFloat(m[GrMatrix::kMPersp0]),
// col 1
GrScalarToFloat(m[GrMatrix::kMSkewX]),
GrScalarToFloat(m[GrMatrix::kMScaleY]),
0,
GrScalarToFloat(m[GrMatrix::kMPersp1]),
// col 2
0, 0, 0, 0,
// col3
GrScalarToFloat(m[GrMatrix::kMTransX]),
GrScalarToFloat(m[GrMatrix::kMTransY]),
0.0f,
GrScalarToFloat(m[GrMatrix::kMPersp2])
};
GL_CALL(MatrixMode(GR_GL_PROJECTION));
GL_CALL(LoadMatrixf(mv));
fHWPathMatrixState.fViewMatrix = vm;
fHWPathMatrixState.fRTSize = viewportSize;
}
} else if (!fCurrentProgram->fViewMatrix.cheapEqualTo(vm) ||
fCurrentProgram->fViewportSize != viewportSize) {
GrMatrix m;
m.setAll(
GrIntToScalar(2) / viewportSize.fWidth, 0, -GR_Scalar1,
0,-GrIntToScalar(2) / viewportSize.fHeight, GR_Scalar1,
0, 0, GrMatrix::I()[8]);
m.setConcat(m, vm);
// ES doesn't allow you to pass true to the transpose param,
// so do our own transpose
GrGLfloat mt[] = {
GrScalarToFloat(m[GrMatrix::kMScaleX]),
GrScalarToFloat(m[GrMatrix::kMSkewY]),
GrScalarToFloat(m[GrMatrix::kMPersp0]),
GrScalarToFloat(m[GrMatrix::kMSkewX]),
GrScalarToFloat(m[GrMatrix::kMScaleY]),
GrScalarToFloat(m[GrMatrix::kMPersp1]),
GrScalarToFloat(m[GrMatrix::kMTransX]),
GrScalarToFloat(m[GrMatrix::kMTransY]),
GrScalarToFloat(m[GrMatrix::kMPersp2])
};
fCurrentProgram->fUniformManager.setMatrix3f(fCurrentProgram->fUniforms.fViewMatrixUni, mt);
fCurrentProgram->fViewMatrix = vm;
fCurrentProgram->fViewportSize = viewportSize;
}
}
