/**
* Do software-based glCopyPixels.
* By time we get here, all parameters will have been error-checked.
*/
void
_swrast_CopyPixels( struct gl_context *ctx,
GLint srcx, GLint srcy, GLsizei width, GLsizei height,
GLint destx, GLint desty, GLenum type )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_renderbuffer *rb;
if (!_mesa_check_conditional_render(ctx))
return; /* don't copy */
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (!(SWRAST_CONTEXT(ctx)->_RasterMask != 0x0 ||
ctx->Pixel.ZoomX != 1.0F ||
ctx->Pixel.ZoomY != 1.0F ||
ctx->_ImageTransferState) &&
swrast_fast_copy_pixels(ctx, srcx, srcy, width, height, destx, desty,
type)) {
/* all done */
return;
}
swrast_render_start(ctx);
rb = map_readbuffer(ctx, type);
switch (type) {
case GL_COLOR:
copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty );
break;
case GL_DEPTH:
copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
break;
case GL_STENCIL:
copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
break;
case GL_DEPTH_STENCIL_EXT:
/* Copy buffers separately (if the fast copy path wasn't taken) */
copy_depth_pixels(ctx, srcx, srcy, width, height, destx, desty);
copy_stencil_pixels(ctx, srcx, srcy, width, height, destx, desty);
break;
default:
_mesa_problem(ctx, "unexpected type in _swrast_CopyPixels");
}
swrast_render_finish(ctx);
if (rb) {
struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
ctx->Driver.UnmapRenderbuffer(ctx, rb);
srb->Map = NULL;
}
}
/**
* 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
};
static const GLenum buffer_enums[3] = {
GL_COLOR,
GL_DEPTH,
GL_STENCIL,
};
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);
/* First, try covering whatever buffers possible using the fast 1:1 copy
* path.
*/
if (srcX1 - srcX0 == dstX1 - dstX0 &&
srcY1 - srcY0 == dstY1 - dstY0 &&
srcX0 < srcX1 &&
srcY0 < srcY1 &&
dstX0 < dstX1 &&
dstY0 < dstY1) {
for (i = 0; i < 3; i++) {
if (mask & buffers[i]) {
if (swrast_fast_copy_pixels(ctx,
srcX0, srcY0,
srcX1 - srcX0, srcY1 - srcY0,
dstX0, dstY0,
buffer_enums[i])) {
mask &= ~buffers[i];
}
}
}
if (!mask)
return;
}
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);
}
}
}
/**
* Software fallback for glBlitFramebufferEXT().
*/
void
_swrast_BlitFramebuffer(struct gl_context *ctx,
struct gl_framebuffer *readFb,
struct gl_framebuffer *drawFb,
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
};
static const GLenum buffer_enums[3] = {
GL_COLOR,
GL_DEPTH,
GL_STENCIL,
};
GLint i;
/* Page 679 of OpenGL 4.4 spec says:
* "Added BlitFramebuffer to commands affected by conditional rendering in
* section 10.10 (Bug 9562)."
*/
if (!_mesa_check_conditional_render(ctx))
return; /* Do not blit */
if (!_mesa_clip_blit(ctx, readFb, drawFb, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return;
}
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived(ctx);
/* First, try covering whatever buffers possible using the fast 1:1 copy
* path.
*/
if (srcX1 - srcX0 == dstX1 - dstX0 &&
srcY1 - srcY0 == dstY1 - dstY0 &&
srcX0 < srcX1 &&
srcY0 < srcY1 &&
dstX0 < dstX1 &&
dstY0 < dstY1) {
for (i = 0; i < 3; i++) {
if (mask & buffers[i]) {
if (swrast_fast_copy_pixels(ctx,
readFb, drawFb,
srcX0, srcY0,
srcX1 - srcX0, srcY1 - srcY0,
dstX0, dstY0,
buffer_enums[i])) {
mask &= ~buffers[i];
}
}
}
if (!mask)
return;
}
if (filter == GL_NEAREST) {
for (i = 0; i < 3; i++) {
if (mask & buffers[i]) {
blit_nearest(ctx, readFb, drawFb, 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, readFb, drawFb, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1);
}
}
}
