/**
* Software fallback for glBlitFramebufferEXT().
*/
void
_swrast_BlitFramebuffer(struct gl_context *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
static const GLbitfield buffers[3] = {
GL_COLOR_BUFFER_BIT,
GL_DEPTH_BUFFER_BIT,
GL_STENCIL_BUFFER_BIT
};
GLint i;
if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return;
}
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived(ctx);
swrast_render_start(ctx);
if (srcX1 - srcX0 == dstX1 - dstX0 &&
srcY1 - srcY0 == dstY1 - dstY0 &&
srcX0 < srcX1 &&
srcY0 < srcY1 &&
dstX0 < dstX1 &&
dstY0 < dstY1) {
/* no stretching or flipping.
* filter doesn't matter.
*/
for (i = 0; i < 3; i++) {
if (mask & buffers[i]) {
simple_blit(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, buffers[i]);
}
}
}
else {
if (filter == GL_NEAREST) {
for (i = 0; i < 3; i++) {
if (mask & buffers[i]) {
blit_nearest(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, buffers[i]);
}
}
}
else {
ASSERT(filter == GL_LINEAR);
if (mask & GL_COLOR_BUFFER_BIT) { /* depth/stencil not allowed */
blit_linear(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1);
}
}
}
swrast_render_finish(ctx);
}
/**
* Software fallback for glBlitFramebufferEXT().
*/
void
_swrast_BlitFramebuffer(GLcontext *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
static const GLbitfield buffers[3] = {
GL_COLOR_BUFFER_BIT,
GL_DEPTH_BUFFER_BIT,
GL_STENCIL_BUFFER_BIT
};
GLint i;
if (!_mesa_check_conditional_render(ctx))
return; /* don't clear */
if (!ctx->DrawBuffer->_NumColorDrawBuffers)
return;
if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return;
}
swrast_render_start(ctx);
if (srcX1 - srcX0 == dstX1 - dstX0 &&
srcY1 - srcY0 == dstY1 - dstY0 &&
srcX0 < srcX1 &&
srcY0 < srcY1 &&
dstX0 < dstX1 &&
dstY0 < dstY1) {
/* no stretching or flipping.
* filter doesn't matter.
*/
for (i = 0; i < 3; i++) {
if (mask & buffers[i]) {
simple_blit(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, buffers[i]);
}
}
}
else {
if (filter == GL_NEAREST) {
for (i = 0; i < 3; i++) {
if (mask & buffers[i]) {
blit_nearest(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, buffers[i]);
}
}
}
else {
ASSERT(filter == GL_LINEAR);
if (mask & GL_COLOR_BUFFER_BIT) { /* depth/stencil not allowed */
blit_linear(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1);
}
}
}
swrast_render_finish(ctx);
}
