static void
sw_MapRenderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **mapOut, GLint *rowStrideOut)
{
if(rb->ClassID == SW_FRONT_RENDERBUFFER_CLASS)
{
/* This is our front buffer */
struct sw_front_renderbuffer* srb = (struct sw_front_renderbuffer*)rb;
struct sw_framebuffer* fb = CONTAINING_RECORD(srb, struct sw_framebuffer, frontbuffer);
/* Set the stride */
*rowStrideOut = WIDTH_BYTES_ALIGN32(rb->Width, pixel_formats[fb->format_index].color_bits);
/* Remember where we "mapped" */
srb->x = x; srb->y = y; srb->w = w; srb->h = h;
/* Remember if we should write it later */
srb->write = !!(mode & GL_MAP_WRITE_BIT);
/* Get the bits, if needed */
if(mode & GL_MAP_READ_BIT)
{
BitBlt(srb->hdcmem, srb->x, srb->y, srb->w, srb->h,
IntGetCurrentDC(), srb->x, srb->y, SRCCOPY);
}
/* And return it */
*mapOut = (BYTE*)srb->swrast.Buffer + *rowStrideOut*y + x*pixel_formats[fb->format_index].color_bits/8;
return;
}
if(rb->ClassID == SW_BACK_RENDERBUFFER_CLASS)
{
/* This is our front buffer */
struct swrast_renderbuffer* srb = (struct swrast_renderbuffer*)rb;
const GLuint bpp = _mesa_get_format_bytes(rb->Format);
/* Set the stride */
*rowStrideOut = srb->RowStride;
*mapOut = (BYTE*)srb->Buffer + srb->RowStride*y + x*bpp;
return;
}
/* Let mesa rasterizer take care of this */
_swrast_map_soft_renderbuffer(ctx, rb, x, y, w, h, mode,
mapOut, rowStrideOut);
}
static GLboolean
sw_fb_renderbuffer_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct sw_front_renderbuffer* srb = (struct sw_front_renderbuffer*)rb;
struct sw_framebuffer* fb = CONTAINING_RECORD(srb, struct sw_framebuffer, frontbuffer);
HDC hdc = IntGetCurrentDC();
/* Don't bother if the size doesn't change */
if(rb->Width == width && rb->Height == height)
return GL_TRUE;
/* Delete every objects which could have been used before */
sw_fb_renderbuffer_delete(&srb->swrast.Base);
/* So the app wants to use the frontbuffer, allocate a DIB for it */
srb->hbmp = CreateDIBSection(
hdc,
&fb->bmi,
DIB_RGB_COLORS,
(void**)&srb->swrast.Buffer,
NULL, 0);
if(!srb->hbmp)
{
ERR("Failed to create the DIB section for the front buffer, %lu.\n", GetLastError());
return GL_FALSE;
}
/* Create the DC and attach the DIB section to it */
srb->hdcmem = CreateCompatibleDC(hdc);
assert(srb->hdcmem != NULL);
srb->hbmp = SelectObject(srb->hdcmem, srb->hbmp);
assert(srb->hbmp != NULL);
/* Set formats, width and height */
srb->swrast.Base.Format = pixel_formats[fb->format_index].mesa;
srb->swrast.Base.Width = width;
srb->swrast.Base.Height = height;
return GL_TRUE;
}
static void
sw_UnmapRenderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
{
if (rb->ClassID== SW_FRONT_RENDERBUFFER_CLASS)
{
/* This is our front buffer */
struct sw_front_renderbuffer* srb = (struct sw_front_renderbuffer*)rb;
if(srb->write)
{
/* Copy the bits to our display */
BitBlt(IntGetCurrentDC(),
srb->x, srb->y, srb->w, srb->h,
srb->hdcmem, srb->x, srb->y, SRCCOPY);
srb->write = FALSE;
}
return;
}
if(rb->ClassID == SW_BACK_RENDERBUFFER_CLASS)
return; /* nothing to do */
/* Let mesa rasterizer take care of this */
_swrast_unmap_soft_renderbuffer(ctx, rb);
}
HDC WINAPI wglGetCurrentDC(void)
{
return IntGetCurrentDC();
}
