void
DrawBlitProg::Draw(const BaseArgs& args, const YUVArgs* const argsYUV) const
{
const auto& gl = mParent.mGL;
const SaveRestoreCurrentProgram oldProg(gl);
gl->fUseProgram(mProg);
// --
Mat3 destMatrix;
if (args.destRect) {
const auto& destRect = args.destRect.value();
destMatrix = SubRectMat3(destRect.X() / args.destSize.width,
destRect.Y() / args.destSize.height,
destRect.Width() / args.destSize.width,
destRect.Height() / args.destSize.height);
} else {
destMatrix = Mat3::I();
}
if (args.yFlip) {
// Apply the y-flip matrix before the destMatrix.
// That is, flip y=[0-1] to y=[1-0] before we restrict to the destRect.
destMatrix.at(2,1) += destMatrix.at(1,1);
destMatrix.at(1,1) *= -1.0f;
}
gl->fUniformMatrix3fv(mLoc_uDestMatrix, 1, false, destMatrix.m);
gl->fUniformMatrix3fv(mLoc_uTexMatrix0, 1, false, args.texMatrix0.m);
MOZ_ASSERT(bool(argsYUV) == (mLoc_uColorMatrix != -1));
if (argsYUV) {
gl->fUniformMatrix3fv(mLoc_uTexMatrix1, 1, false, argsYUV->texMatrix1.m);
const auto& colorMatrix = gfxUtils::YuvToRgbMatrix4x4ColumnMajor(argsYUV->colorSpace);
float mat4x3[4*3];
switch (mType_uColorMatrix) {
case LOCAL_GL_FLOAT_MAT4:
gl->fUniformMatrix4fv(mLoc_uColorMatrix, 1, false, colorMatrix);
break;
case LOCAL_GL_FLOAT_MAT4x3:
for (int x = 0; x < 4; x++) {
for (int y = 0; y < 3; y++) {
mat4x3[3*x+y] = colorMatrix[4*x+y];
}
}
gl->fUniformMatrix4x3fv(mLoc_uColorMatrix, 1, false, mat4x3);
break;
default:
gfxCriticalError() << "Bad mType_uColorMatrix: "
<< gfx::hexa(mType_uColorMatrix);
}
}
// --
const ScopedDrawBlitState drawState(gl, args.destSize);
GLuint oldVAO;
GLint vaa0Enabled;
GLint vaa0Size;
GLenum vaa0Type;
GLint vaa0Normalized;
GLsizei vaa0Stride;
GLvoid* vaa0Pointer;
if (mParent.mQuadVAO) {
oldVAO = gl->GetIntAs<GLuint>(LOCAL_GL_VERTEX_ARRAY_BINDING);
gl->fBindVertexArray(mParent.mQuadVAO);
} else {
gl->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_ENABLED, &vaa0Enabled);
gl->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_SIZE, &vaa0Size);
gl->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_TYPE, (GLint*)&vaa0Type);
gl->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, &vaa0Normalized);
gl->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_STRIDE, (GLint*)&vaa0Stride);
gl->fGetVertexAttribPointerv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_POINTER, &vaa0Pointer);
gl->fEnableVertexAttribArray(0);
const ScopedBindArrayBuffer bindVBO(gl, mParent.mQuadVBO);
gl->fVertexAttribPointer(0, 2, LOCAL_GL_FLOAT, false, 0, 0);
}
gl->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
if (mParent.mQuadVAO) {
gl->fBindVertexArray(oldVAO);
} else {
if (vaa0Enabled) {
gl->fEnableVertexAttribArray(0);
} else {
gl->fDisableVertexAttribArray(0);
}
gl->fVertexAttribPointer(0, vaa0Size, vaa0Type, bool(vaa0Normalized), vaa0Stride,
vaa0Pointer);
}
}
