static void setup_framebuffer(const GrGLInterface* gl, int screenWidth, int screenHeight) {
//Setup framebuffer
GrGLuint texture;
GR_GL_CALL(gl, PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
GR_GL_CALL(gl, PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
GR_GL_CALL(gl, GenTextures(1, &texture));
GR_GL_CALL(gl, ActiveTexture(GR_GL_TEXTURE15));
GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, texture));
GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST));
GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST));
GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE));
GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE));
GR_GL_CALL(gl, TexImage2D(GR_GL_TEXTURE_2D,
0, //level
GR_GL_RGBA8, //internal format
screenWidth, // width
screenHeight, // height
0, //border
GR_GL_RGBA, //format
GR_GL_UNSIGNED_BYTE, // type
NULL));
// bind framebuffer
GrGLuint framebuffer;
GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, 0));
GR_GL_CALL(gl, GenFramebuffers(1, &framebuffer));
GR_GL_CALL(gl, BindFramebuffer(GR_GL_FRAMEBUFFER, framebuffer));
GR_GL_CALL(gl, FramebufferTexture2D(GR_GL_FRAMEBUFFER,
GR_GL_COLOR_ATTACHMENT0,
GR_GL_TEXTURE_2D,
texture, 0));
GR_GL_CALL(gl, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
GR_GL_CALL(gl, Viewport(0, 0, screenWidth, screenHeight));
}
void GrGLTexture::uploadTextureData(int x,
int y,
int width,
int height,
const void* srcData) {
GPUGL->setSpareTextureUnit();
// glCompressedTexSubImage2D doesn't support any formats
// (at least without extensions)
GrAssert(fUploadFormat != GR_GL_PALETTE8_RGBA8);
// If we need to update textures that are created upside down
// then we have to modify this code to flip the srcData
GrAssert(kTopDown_Orientation == fOrientation);
GR_GL(BindTexture(GR_GL_TEXTURE_2D, fTexIDObj->id()));
GR_GL(PixelStorei(GR_GL_UNPACK_ALIGNMENT, fUploadByteCount));
GR_GL(TexSubImage2D(GR_GL_TEXTURE_2D, 0, x, y, width, height,
fUploadFormat, fUploadType, srcData));
}
void GrGLRestoreResetRowLength() {
if (GR_GL_SUPPORT_DESKTOP) {
GR_GL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
}
}
void GrGLResetRowLength(const GrGLInterface* gl) {
if (gl->supportsDesktop()) {
GR_GL_CALL(gl, PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
}
}