LONG APIENTRY
DrvDescribePixelFormat(
HDC hdc,
INT iPixelFormat,
ULONG cjpfd,
PIXELFORMATDESCRIPTOR *ppfd )
{
uint count;
uint index;
const struct stw_pixelformat_info *pfi;
(void) hdc;
if (!stw_dev)
return 0;
count = stw_pixelformat_get_extended_count();
index = (uint) iPixelFormat - 1;
if (ppfd == NULL)
return count;
if (index >= count || cjpfd != sizeof( PIXELFORMATDESCRIPTOR ))
return 0;
pfi = stw_pixelformat_get_info( index );
memcpy(ppfd, &pfi->pfd, sizeof( PIXELFORMATDESCRIPTOR ));
return count;
}
/* Only used by the wgl code, but have it here to avoid exporting the
* pixelformat.h functionality.
*/
int stw_pixelformat_choose( HDC hdc,
CONST PIXELFORMATDESCRIPTOR *ppfd )
{
uint count;
uint index;
uint bestindex;
uint bestdelta;
(void) hdc;
count = stw_pixelformat_get_extended_count();
bestindex = 0;
bestdelta = ~0U;
for (index = 1; index <= count; index++) {
uint delta = 0;
const struct stw_pixelformat_info *pfi = stw_pixelformat_get_info( index );
if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE) &&
!!(ppfd->dwFlags & PFD_DOUBLEBUFFER) !=
!!(pfi->pfd.dwFlags & PFD_DOUBLEBUFFER))
continue;
/* FIXME: Take in account individual channel bits */
if (ppfd->cColorBits != pfi->pfd.cColorBits)
delta += 8;
if (ppfd->cDepthBits != pfi->pfd.cDepthBits)
delta += 4;
if (ppfd->cStencilBits != pfi->pfd.cStencilBits)
delta += 2;
if (ppfd->cAlphaBits != pfi->pfd.cAlphaBits)
delta++;
if (delta < bestdelta) {
bestindex = index;
bestdelta = delta;
if (bestdelta == 0)
break;
}
}
return bestindex;
}
BOOL APIENTRY
DrvSetPixelFormat(
HDC hdc,
LONG iPixelFormat )
{
uint count;
uint index;
struct stw_framebuffer *fb;
if (!stw_dev)
return FALSE;
index = (uint) iPixelFormat - 1;
count = stw_pixelformat_get_extended_count();
if (index >= count)
return FALSE;
fb = stw_framebuffer_from_hdc_locked(hdc);
if(fb) {
/* SetPixelFormat must be called only once */
stw_framebuffer_release( fb );
return FALSE;
}
fb = stw_framebuffer_create(hdc, iPixelFormat);
if(!fb) {
return FALSE;
}
stw_framebuffer_release( fb );
/* Some applications mistakenly use the undocumented wglSetPixelFormat
* function instead of SetPixelFormat, so we call SetPixelFormat here to
* avoid opengl32.dll's wglCreateContext to fail */
if (GetPixelFormat(hdc) == 0) {
SetPixelFormat(hdc, iPixelFormat, NULL);
}
return TRUE;
}
static boolean
stw_query_attrib(
int iPixelFormat,
int iLayerPlane,
int attrib,
int *pvalue )
{
uint count;
const struct stw_pixelformat_info *pfi;
count = stw_pixelformat_get_extended_count();
if (attrib == WGL_NUMBER_PIXEL_FORMATS_ARB) {
*pvalue = (int) count;
return TRUE;
}
pfi = stw_pixelformat_get_info( iPixelFormat );
if (!pfi) {
return FALSE;
}
switch (attrib) {
case WGL_DRAW_TO_WINDOW_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_DRAW_TO_WINDOW ? TRUE : FALSE;
return TRUE;
case WGL_DRAW_TO_BITMAP_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_DRAW_TO_BITMAP ? TRUE : FALSE;
return TRUE;
case WGL_NEED_PALETTE_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_NEED_PALETTE ? TRUE : FALSE;
return TRUE;
case WGL_NEED_SYSTEM_PALETTE_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_NEED_SYSTEM_PALETTE ? TRUE : FALSE;
return TRUE;
case WGL_SWAP_METHOD_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_SWAP_COPY ? WGL_SWAP_COPY_ARB : WGL_SWAP_UNDEFINED_ARB;
return TRUE;
case WGL_SWAP_LAYER_BUFFERS_ARB:
*pvalue = FALSE;
return TRUE;
case WGL_NUMBER_OVERLAYS_ARB:
*pvalue = 0;
return TRUE;
case WGL_NUMBER_UNDERLAYS_ARB:
*pvalue = 0;
return TRUE;
}
if (iLayerPlane != 0)
return FALSE;
switch (attrib) {
case WGL_ACCELERATION_ARB:
*pvalue = WGL_FULL_ACCELERATION_ARB;
break;
case WGL_TRANSPARENT_ARB:
*pvalue = FALSE;
break;
case WGL_TRANSPARENT_RED_VALUE_ARB:
case WGL_TRANSPARENT_GREEN_VALUE_ARB:
case WGL_TRANSPARENT_BLUE_VALUE_ARB:
case WGL_TRANSPARENT_ALPHA_VALUE_ARB:
case WGL_TRANSPARENT_INDEX_VALUE_ARB:
break;
case WGL_SHARE_DEPTH_ARB:
case WGL_SHARE_STENCIL_ARB:
case WGL_SHARE_ACCUM_ARB:
*pvalue = TRUE;
break;
case WGL_SUPPORT_GDI_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_SUPPORT_GDI ? TRUE : FALSE;
break;
case WGL_SUPPORT_OPENGL_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_SUPPORT_OPENGL ? TRUE : FALSE;
break;
case WGL_DOUBLE_BUFFER_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_DOUBLEBUFFER ? TRUE : FALSE;
break;
case WGL_STEREO_ARB:
*pvalue = pfi->pfd.dwFlags & PFD_STEREO ? TRUE : FALSE;
break;
case WGL_PIXEL_TYPE_ARB:
switch (pfi->pfd.iPixelType) {
case PFD_TYPE_RGBA:
if (util_format_is_float(pfi->stvis.color_format)) {
*pvalue = WGL_TYPE_RGBA_FLOAT_ARB;
}
else {
*pvalue = WGL_TYPE_RGBA_ARB;
}
break;
case PFD_TYPE_COLORINDEX:
*pvalue = WGL_TYPE_COLORINDEX_ARB;
break;
default:
return FALSE;
}
break;
case WGL_COLOR_BITS_ARB:
*pvalue = pfi->pfd.cColorBits;
break;
case WGL_RED_BITS_ARB:
*pvalue = pfi->pfd.cRedBits;
break;
case WGL_RED_SHIFT_ARB:
*pvalue = pfi->pfd.cRedShift;
break;
case WGL_GREEN_BITS_ARB:
*pvalue = pfi->pfd.cGreenBits;
break;
case WGL_GREEN_SHIFT_ARB:
*pvalue = pfi->pfd.cGreenShift;
break;
case WGL_BLUE_BITS_ARB:
*pvalue = pfi->pfd.cBlueBits;
break;
case WGL_BLUE_SHIFT_ARB:
*pvalue = pfi->pfd.cBlueShift;
break;
case WGL_ALPHA_BITS_ARB:
*pvalue = pfi->pfd.cAlphaBits;
break;
case WGL_ALPHA_SHIFT_ARB:
*pvalue = pfi->pfd.cAlphaShift;
break;
case WGL_ACCUM_BITS_ARB:
*pvalue = pfi->pfd.cAccumBits;
break;
case WGL_ACCUM_RED_BITS_ARB:
*pvalue = pfi->pfd.cAccumRedBits;
break;
case WGL_ACCUM_GREEN_BITS_ARB:
*pvalue = pfi->pfd.cAccumGreenBits;
break;
case WGL_ACCUM_BLUE_BITS_ARB:
*pvalue = pfi->pfd.cAccumBlueBits;
break;
case WGL_ACCUM_ALPHA_BITS_ARB:
*pvalue = pfi->pfd.cAccumAlphaBits;
break;
case WGL_DEPTH_BITS_ARB:
*pvalue = pfi->pfd.cDepthBits;
break;
case WGL_STENCIL_BITS_ARB:
*pvalue = pfi->pfd.cStencilBits;
break;
case WGL_AUX_BUFFERS_ARB:
*pvalue = pfi->pfd.cAuxBuffers;
break;
case WGL_SAMPLE_BUFFERS_ARB:
*pvalue = 1;
break;
case WGL_SAMPLES_ARB:
*pvalue = pfi->stvis.samples;
break;
/* WGL_ARB_pbuffer */
case WGL_MAX_PBUFFER_WIDTH_ARB:
case WGL_MAX_PBUFFER_HEIGHT_ARB:
*pvalue = stw_dev->max_2d_length;
break;
case WGL_MAX_PBUFFER_PIXELS_ARB:
*pvalue = stw_dev->max_2d_length * stw_dev->max_2d_length;
break;
case WGL_DRAW_TO_PBUFFER_ARB:
*pvalue = 1;
break;
default:
return FALSE;
}
return TRUE;
}
WINGDIAPI BOOL APIENTRY
wglChoosePixelFormatARB(
HDC hdc,
const int *piAttribIList,
const FLOAT *pfAttribFList,
UINT nMaxFormats,
int *piFormats,
UINT *nNumFormats )
{
uint count;
struct stw_pixelformat_score *scores;
uint i;
*nNumFormats = 0;
/* Allocate and initialize pixelformat score table -- better matches
* have higher scores. Start with a high score and take out penalty
* points for a mismatch when the match does not have to be exact.
* Set a score to 0 if there is a mismatch for an exact match criteria.
*/
count = stw_pixelformat_get_extended_count();
scores = (struct stw_pixelformat_score *) MALLOC( count * sizeof( struct stw_pixelformat_score ) );
if (scores == NULL)
return FALSE;
for (i = 0; i < count; i++) {
scores[i].points = 0x7fffffff;
scores[i].index = i;
}
/* Given the attribute list calculate a score for each pixelformat.
*/
if (piAttribIList != NULL) {
while (*piAttribIList != 0) {
if (!score_pixelformats( scores, count, piAttribIList[0], piAttribIList[1] )) {
FREE( scores );
return FALSE;
}
piAttribIList += 2;
}
}
if (pfAttribFList != NULL) {
while (*pfAttribFList != 0) {
if (!score_pixelformats( scores, count, (int) pfAttribFList[0], (int) pfAttribFList[1] )) {
FREE( scores );
return FALSE;
}
pfAttribFList += 2;
}
}
/* Bubble-sort the resulting scores. Pixelformats with higher scores go first.
* TODO: Find out if there are any patent issues with it.
*/
if (count > 1) {
uint n = count;
boolean swapped;
do {
swapped = FALSE;
for (i = 1; i < n; i++) {
if (scores[i - 1].points < scores[i].points) {
struct stw_pixelformat_score score = scores[i - 1];
scores[i - 1] = scores[i];
scores[i] = score;
swapped = TRUE;
}
}
n--;
}
while (swapped);
}
/* Return a list of pixelformats that are the best match.
* Reject pixelformats with non-positive scores.
*/
for (i = 0; i < count; i++) {
if (scores[i].points > 0) {
piFormats[*nNumFormats] = scores[i].index + 1;
(*nNumFormats)++;
if (*nNumFormats >= nMaxFormats) {
break;
}
}
}
FREE( scores );
return TRUE;
}
