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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGLConfig.h"
#include "GrGpuGLFixed.h"
#include "GrGpuVertex.h"
#define SKIP_CACHE_CHECK true
struct GrGpuMatrix {
GrGLfloat fMat[16];
void reset() {
Gr_bzero(fMat, sizeof(fMat));
fMat[0] = fMat[5] = fMat[10] = fMat[15] = GR_Scalar1;
}
void set(const GrMatrix& m) {
Gr_bzero(fMat, sizeof(fMat));
fMat[0] = GrScalarToFloat(m[GrMatrix::kMScaleX]);
fMat[4] = GrScalarToFloat(m[GrMatrix::kMSkewX]);
fMat[12] = GrScalarToFloat(m[GrMatrix::kMTransX]);
fMat[1] = GrScalarToFloat(m[GrMatrix::kMSkewY]);
fMat[5] = GrScalarToFloat(m[GrMatrix::kMScaleY]);
fMat[13] = GrScalarToFloat(m[GrMatrix::kMTransY]);
fMat[3] = GrScalarToFloat(m[GrMatrix::kMPersp0]);
fMat[7] = GrScalarToFloat(m[GrMatrix::kMPersp1]);
fMat[15] = GrScalarToFloat(m[GrMatrix::kMPersp2]);
fMat[10] = 1.f; // z-scale
}
};
// these must match the order in the corresponding enum in GrGpu.h
static const GrGLenum gMatrixMode2Enum[] = {
GR_GL_MODELVIEW, GR_GL_TEXTURE
};
#define GL_CALL(X) GR_GL_CALL(this->glInterface(), X)
///////////////////////////////////////////////////////////////////////////////
namespace {
GrGLBinding get_binding_in_use(const GrGLInterface* gl) {
if (gl->supportsDesktop()) {
return kDesktop_GrGLBinding;
} else {
GrAssert(gl->supportsES1());
return kES1_GrGLBinding;
}
}
}
GrGpuGLFixed::GrGpuGLFixed(const GrGLInterface* gl)
: GrGpuGL(gl, get_binding_in_use(gl)) {
}
GrGpuGLFixed::~GrGpuGLFixed() {
}
void GrGpuGLFixed::resetContext() {
INHERITED::resetContext();
GL_CALL(Disable(GR_GL_TEXTURE_2D));
for (int s = 0; s < kNumStages; ++s) {
setTextureUnit(s);
GL_CALL(EnableClientState(GR_GL_VERTEX_ARRAY));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_TEXTURE_ENV_MODE,
GR_GL_COMBINE));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_COMBINE_RGB,
GR_GL_MODULATE));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_SRC0_RGB,
GR_GL_TEXTURE0+s));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_SRC1_RGB,
GR_GL_PREVIOUS));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_OPERAND1_RGB,
GR_GL_SRC_COLOR));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_COMBINE_ALPHA,
GR_GL_MODULATE));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_SRC0_ALPHA,
GR_GL_TEXTURE0+s));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_OPERAND0_ALPHA,
GR_GL_SRC_ALPHA));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_SRC1_ALPHA,
GR_GL_PREVIOUS));
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_OPERAND1_ALPHA,
GR_GL_SRC_ALPHA));
// color oprand0 changes between GL_SRC_COLR and GL_SRC_ALPHA depending
// upon whether we have a (premultiplied) RGBA texture or just an ALPHA
// texture, e.g.:
//glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
fHWRGBOperand0[s] = (TextureEnvRGBOperands) -1;
}
fHWGeometryState.fVertexLayout = 0;
fHWGeometryState.fVertexOffset = ~0;
GL_CALL(EnableClientState(GR_GL_VERTEX_ARRAY));
GL_CALL(DisableClientState(GR_GL_TEXTURE_COORD_ARRAY));
GL_CALL(ShadeModel(GR_GL_FLAT));
GL_CALL(DisableClientState(GR_GL_COLOR_ARRAY));
GL_CALL(PointSize(1.f));
GrGLClearErr(this->glInterface());
fTextVerts = false;
fBaseVertex = 0xffffffff;
}
void GrGpuGLFixed::flushProjectionMatrix() {
float mat[16];
Gr_bzero(mat, sizeof(mat));
GrAssert(NULL != fCurrDrawState.fRenderTarget);
mat[0] = 2.f / fCurrDrawState.fRenderTarget->width();
mat[5] = -2.f / fCurrDrawState.fRenderTarget->height();
mat[10] = -1.f;
mat[15] = 1;
mat[12] = -1.f;
mat[13] = 1.f;
GL_CALL(MatrixMode(GR_GL_PROJECTION));
GL_CALL(LoadMatrixf(mat));
}
bool GrGpuGLFixed::flushGraphicsState(GrPrimitiveType type) {
bool usingTextures[kNumStages];
for (int s = 0; s < kNumStages; ++s) {
usingTextures[s] = this->isStageEnabled(s);
if (usingTextures[s] && fCurrDrawState.fSamplerStates[s].isGradient()) {
unimpl("Fixed pipe doesn't support radial/sweep gradients");
return false;
}
}
if (kES1_GrGLBinding == this->glBinding()) {
if (BlendCoeffReferencesConstant(fCurrDrawState.fSrcBlend) ||
BlendCoeffReferencesConstant(fCurrDrawState.fDstBlend)) {
unimpl("ES1 doesn't support blend constant");
return false;
}
}
if (!flushGLStateCommon(type)) {
return false;
}
this->flushBlend(type, fCurrDrawState.fSrcBlend, fCurrDrawState.fDstBlend);
if (fDirtyFlags.fRenderTargetChanged) {
flushProjectionMatrix();
}
for (int s = 0; s < kNumStages; ++s) {
bool wasUsingTexture = StageWillBeUsed(s, fHWGeometryState.fVertexLayout, fHWDrawState);
if (usingTextures[s] != wasUsingTexture) {
setTextureUnit(s);
if (usingTextures[s]) {
GL_CALL(Enable(GR_GL_TEXTURE_2D));
} else {
GL_CALL(Disable(GR_GL_TEXTURE_2D));
}
}
}
uint32_t vertColor = (this->getGeomSrc().fVertexLayout & kColor_VertexLayoutBit);
uint32_t prevVertColor = (fHWGeometryState.fVertexLayout &
kColor_VertexLayoutBit);
if (vertColor != prevVertColor) {
if (vertColor) {
GL_CALL(ShadeModel(GR_GL_SMOOTH));
// invalidate the immediate mode color
fHWDrawState.fColor = GrColor_ILLEGAL;
} else {
GL_CALL(ShadeModel(GR_GL_FLAT));
}
}
if (!vertColor && fHWDrawState.fColor != fCurrDrawState.fColor) {
GL_CALL(Color4ub(GrColorUnpackR(fCurrDrawState.fColor),
GrColorUnpackG(fCurrDrawState.fColor),
GrColorUnpackB(fCurrDrawState.fColor),
GrColorUnpackA(fCurrDrawState.fColor)));
fHWDrawState.fColor = fCurrDrawState.fColor;
}
// set texture environment, decide whether we are modulating by RGB or A.
for (int s = 0; s < kNumStages; ++s) {
if (usingTextures[s]) {
GrGLTexture* texture = (GrGLTexture*)fCurrDrawState.fTextures[s];
if (NULL != texture) {
TextureEnvRGBOperands nextRGBOperand0 =
(GrPixelConfigIsAlphaOnly(texture->config())) ?
kAlpha_TextureEnvRGBOperand :
kColor_TextureEnvRGBOperand;
if (fHWRGBOperand0[s] != nextRGBOperand0) {
setTextureUnit(s);
GL_CALL(TexEnvi(GR_GL_TEXTURE_ENV,
GR_GL_OPERAND0_RGB,
(nextRGBOperand0==kAlpha_TextureEnvRGBOperand) ?
GR_GL_SRC_ALPHA :
GR_GL_SRC_COLOR));
fHWRGBOperand0[s] = nextRGBOperand0;
}
if (((1 << s) & fDirtyFlags.fTextureChangedMask) ||
(fHWDrawState.fSamplerStates[s].getMatrix() !=
getSamplerMatrix(s))) {
GrMatrix texMat = getSamplerMatrix(s);
AdjustTextureMatrix(texture,
GrSamplerState::kNormal_SampleMode,
&texMat);
GrGpuMatrix glm;
glm.set(texMat);
setTextureUnit(s);
GL_CALL(MatrixMode(GR_GL_TEXTURE));
GL_CALL(LoadMatrixf(glm.fMat));
recordHWSamplerMatrix(s, getSamplerMatrix(s));
}
} else {
GrAssert(!"Rendering with texture vert flag set but no bound texture");
return false;
}
}
}
if (fHWDrawState.fViewMatrix != fCurrDrawState.fViewMatrix) {
GrGpuMatrix glm;
glm.set(fCurrDrawState.fViewMatrix);
GL_CALL(MatrixMode(GR_GL_MODELVIEW));
GL_CALL(LoadMatrixf(glm.fMat));
fHWDrawState.fViewMatrix =
fCurrDrawState.fViewMatrix;
}
resetDirtyFlags();
return true;
}
void GrGpuGLFixed::setupGeometry(int* startVertex,
int* startIndex,
int vertexCount,
int indexCount) {
int newColorOffset;
int newTexCoordOffsets[kNumStages];
int newEdgeOffset;
GrGLsizei newStride = VertexSizeAndOffsetsByStage(this->getGeomSrc().fVertexLayout,
newTexCoordOffsets,
&newColorOffset,
&newEdgeOffset);
GrAssert(-1 == newEdgeOffset); // not supported by fixed pipe
int oldColorOffset;
int oldTexCoordOffsets[kNumStages];
int oldEdgeOffset;
GrGLsizei oldStride = VertexSizeAndOffsetsByStage(fHWGeometryState.fVertexLayout,
oldTexCoordOffsets,
&oldColorOffset,
&oldEdgeOffset);
GrAssert(-1 == oldEdgeOffset);
bool indexed = NULL != startIndex;
int extraVertexOffset;
int extraIndexOffset;
setBuffers(indexed, &extraVertexOffset, &extraIndexOffset);
GrGLenum scalarType;
if (this->getGeomSrc().fVertexLayout & kTextFormat_VertexLayoutBit) {
scalarType = GrGLTextType;
} else {
scalarType = GrGLType;
}
size_t vertexOffset = (*startVertex + extraVertexOffset) * newStride;
*startVertex = 0;
if (indexed) {
*startIndex += extraIndexOffset;
}
// all the Pointers must be set if any of these are true
bool allOffsetsChange = fHWGeometryState.fArrayPtrsDirty ||
vertexOffset != fHWGeometryState.fVertexOffset ||
newStride != oldStride;
// position and tex coord offsets change if above conditions are true
// or the type changed based on text vs nontext type coords.
bool posAndTexChange = allOffsetsChange ||
((GrGLTextType != GrGLType) &&
(kTextFormat_VertexLayoutBit &
(fHWGeometryState.fVertexLayout ^
this->getGeomSrc().fVertexLayout)));
if (posAndTexChange) {
GL_CALL(VertexPointer(2, scalarType,
newStride, (GrGLvoid*)vertexOffset));
fHWGeometryState.fVertexOffset = vertexOffset;
}
for (int s = 0; s < kNumStages; ++s) {
// need to enable array if tex coord offset is 0
// (using positions as coords)
if (newTexCoordOffsets[s] >= 0) {
GrGLvoid* texCoordOffset = (GrGLvoid*)(vertexOffset +
newTexCoordOffsets[s]);
if (oldTexCoordOffsets[s] < 0) {
GL_CALL(ClientActiveTexture(GR_GL_TEXTURE0+s));
GL_CALL(EnableClientState(GR_GL_TEXTURE_COORD_ARRAY));
GL_CALL(TexCoordPointer(2, scalarType,
newStride, texCoordOffset));
} else if (posAndTexChange ||
newTexCoordOffsets[s] != oldTexCoordOffsets[s]) {
GL_CALL(ClientActiveTexture(GR_GL_TEXTURE0+s));
GL_CALL(TexCoordPointer(2, scalarType,
newStride, texCoordOffset));
}
} else if (oldTexCoordOffsets[s] >= 0) {
GL_CALL(ClientActiveTexture(GR_GL_TEXTURE0+s));
GL_CALL(DisableClientState(GR_GL_TEXTURE_COORD_ARRAY));
}
}
if (newColorOffset > 0) {
GrGLvoid* colorOffset = (GrGLvoid*)(vertexOffset + newColorOffset);
if (oldColorOffset <= 0) {
GL_CALL(EnableClientState(GR_GL_COLOR_ARRAY));
GL_CALL(ColorPointer(4, GR_GL_UNSIGNED_BYTE,
newStride, colorOffset));
} else if (allOffsetsChange || newColorOffset != oldColorOffset) {
GL_CALL(ColorPointer(4, GR_GL_UNSIGNED_BYTE,
newStride, colorOffset));
}
} else if (oldColorOffset > 0) {
GL_CALL(DisableClientState(GR_GL_COLOR_ARRAY));
}
fHWGeometryState.fVertexLayout = this->getGeomSrc().fVertexLayout;
fHWGeometryState.fArrayPtrsDirty = false;
}
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