static void InitGL() {
OGLEXT(PFNGLCLIENTACTIVETEXTUREPROC, glClientActiveTexture);
OGLEXT(PFNGLACTIVETEXTUREPROC, glActiveTexture);
OGLEXT(PFNGLDELETEBUFFERSARBPROC, glDeleteBuffers);
OGLEXT(PFNGLGENBUFFERSPROC, glGenBuffers);
OGLEXT(PFNGLBINDBUFFERPROC, glBindBuffer);
OGLEXT(PFNGLBUFFERDATAPROC, glBufferData);
OGLEXT(PFNGLATTACHSHADERPROC, glAttachShader);
OGLEXT(PFNGLCOMPILESHADERPROC, glCompileShader);
OGLEXT(PFNGLCREATEPROGRAMPROC, glCreateProgram);
OGLEXT(PFNGLCREATESHADERPROC, glCreateShader);
OGLEXT(PFNGLDELETEPROGRAMPROC, glDeleteProgram);
OGLEXT(PFNGLDELETESHADERPROC, glDeleteShader);
OGLEXT(PFNGLLINKPROGRAMPROC, glLinkProgram);
OGLEXT(PFNGLSHADERSOURCEPROC, glShaderSource);
OGLEXT(PFNGLUSEPROGRAMPROC, glUseProgram);
OGLEXT(PFNGLGETUNIFORMLOCATIONPROC, glGetUniformLocation);
OGLEXT(PFNGLVERTEXATTRIB4FVARBPROC, glVertexAttrib4fvARB);
OGLEXT(PFNGLGETATTRIBLOCATIONPROC, glGetAttribLocation);
OGLEXT(PFNGLUNIFORMMATRIX4FVARBPROC, glUniformMatrix4fvARB);
OGLEXT(PFNGLUNIFORM3FPROC, glUniform3f);
OGLEXT(PFNGLUNIFORM1IPROC, glUniform1i);
OGLEXT(PFNGLVERTEXATTRIBPOINTERPROC, glVertexAttribPointer);
OGLEXT(PFNGLENABLEVERTEXATTRIBARRAYPROC, glEnableVertexAttribArray);
OGLEXT(PFNGLDISABLEVERTEXATTRIBARRAYPROC, glDisableVertexAttribArray);
OGLEXT(PFNGLGENPROGRAMSARBPROC, glGenProgramsARB);
OGLEXT(PFNGLPROGRAMSTRINGARBPROC, glProgramStringARB);
OGLEXT(PFNGLBINDPROGRAMARBPROC, glBindProgramARB);
OGLEXT(PFNGLDELETEPROGRAMSARBPROC, glDeleteProgramARB);
OGLEXT(PFNGLPROGRAMENVPARAMETER4FARBPROC, glProgramEnvParameter4fARB);
OGLEXT(PFNGLPROGRAMLOCALPARAMETER4FARBPROC, glProgramLocalParameter4fARB);
OGLEXT(PFNGLBINDFRAMEBUFFEREXTPROC, glBindFramebufferEXT);
OGLEXT(PFNGLDELETEFRAMEBUFFERSEXTPROC, glDeleteFramebuffersEXT);
OGLEXT(PFNGLGENFRAMEBUFFERSEXTPROC, glGenFramebuffersEXT);
OGLEXT(PFNGLBINDRENDERBUFFEREXTPROC, glBindRenderbufferEXT);
OGLEXT(PFNGLDELETERENDERBUFFERSEXTPROC, glDeleteRenderbuffersEXT);
OGLEXT(PFNGLGENRENDERBUFFERSEXTPROC, glGenRenderbuffersEXT);
OGLEXT(PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC, glFramebufferRenderbufferEXT);
OGLEXT(PFNGLRENDERBUFFERSTORAGEEXTPROC, glRenderbufferStorageEXT);
OGLEXT(PFNGLFRAMEBUFFERTEXTURE2DEXTPROC, glFramebufferTexture2DEXT);
OGLEXT(PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC, glCheckFramebufferStatusEXT);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
glClearDepth(1.0f);
ClientActiveTexture(GL_TEXTURE0_ARB);
glShadeModel(GL_FLAT);
glDepthFunc(GL_LEQUAL);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
CullFace(true);
AlphaTest(false);
DepthTest(false);
DepthWrite(false);
Blend(false);
}
void GrGpuGLFixed::setupGeometry(int* startVertex,
int* startIndex,
int vertexCount,
int indexCount) {
int newColorOffset;
int newTexCoordOffsets[kNumStages];
GrGLsizei newStride = VertexSizeAndOffsetsByStage(fGeometrySrc.fVertexLayout,
newTexCoordOffsets,
&newColorOffset);
int oldColorOffset;
int oldTexCoordOffsets[kNumStages];
GrGLsizei oldStride = VertexSizeAndOffsetsByStage(fHWGeometryState.fVertexLayout,
oldTexCoordOffsets,
&oldColorOffset);
bool indexed = NULL != startIndex;
int extraVertexOffset;
int extraIndexOffset;
setBuffers(indexed, &extraVertexOffset, &extraIndexOffset);
GrGLenum scalarType;
if (fGeometrySrc.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 ^
fGeometrySrc.fVertexLayout)));
if (posAndTexChange) {
GR_GL(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) {
GR_GL(ClientActiveTexture(GR_GL_TEXTURE0+s));
GR_GL(EnableClientState(GR_GL_TEXTURE_COORD_ARRAY));
GR_GL(TexCoordPointer(2, scalarType, newStride, texCoordOffset));
} else if (posAndTexChange ||
newTexCoordOffsets[s] != oldTexCoordOffsets[s]) {
GR_GL(ClientActiveTexture(GR_GL_TEXTURE0+s));
GR_GL(TexCoordPointer(2, scalarType, newStride, texCoordOffset));
}
} else if (oldTexCoordOffsets[s] >= 0) {
GR_GL(ClientActiveTexture(GR_GL_TEXTURE0+s));
GR_GL(DisableClientState(GR_GL_TEXTURE_COORD_ARRAY));
}
}
if (newColorOffset > 0) {
GrGLvoid* colorOffset = (GrGLvoid*)(vertexOffset + newColorOffset);
if (oldColorOffset <= 0) {
GR_GL(EnableClientState(GR_GL_COLOR_ARRAY));
GR_GL(ColorPointer(4, GR_GL_UNSIGNED_BYTE, newStride, colorOffset));
} else if (allOffsetsChange || newColorOffset != oldColorOffset) {
GR_GL(ColorPointer(4, GR_GL_UNSIGNED_BYTE, newStride, colorOffset));
}
} else if (oldColorOffset > 0) {
GR_GL(DisableClientState(GR_GL_COLOR_ARRAY));
}
fHWGeometryState.fVertexLayout = fGeometrySrc.fVertexLayout;
fHWGeometryState.fArrayPtrsDirty = false;
}