void TileRenderer::startTileRendering(OpenGLRenderer* renderer,
int left, int top,
int right, int bottom) {
int width = 0;
int height = 0;
GLenum status = GL_NO_ERROR;
if (renderer != NULL) {
renderer->getViewport(width, height);
}
if (!left && !right && !top && !bottom) {
left = 0;
top = 0;
right = width;
bottom = height;
}
if (!left && !right && !top && !bottom) {
//can't do tile rendering
LOGE("can't tile render; drity region, width, height not available");
return;
}
int l = left, t = (height - bottom), w = (right - left), h = (bottom - top), preserve = 0;
if (l < 0 || t < 0) {
l = (l < 0) ? 0 : l;
t = (t < 0) ? 0 : t;
preserve = 1;
}
if (w > width || h > height) {
w = (w > width) ? width : w;
h = (h > height) ? height : h;
preserve = 1;
}
//clear off all errors before tiling, if any
while ((status = glGetError()) != GL_NO_ERROR);
if (preserve)
glStartTilingQCOM(l, t, w, h, GL_COLOR_BUFFER_BIT0_QCOM);
else
glStartTilingQCOM(l, t, w, h, GL_NONE);
status = glGetError();
if (status == GL_NO_ERROR)
mIsTiled = true;
}
void Caches::startTiling(GLuint x, GLuint y, GLuint width, GLuint height, bool opaque) {
if (extensions.hasTiledRendering() && !debugOverdraw) {
glStartTilingQCOM(x, y, width, height, (opaque ? GL_NONE : GL_COLOR_BUFFER_BIT0_QCOM));
}
}
