diff options
Diffstat (limited to 'src/gallium/state_trackers/wgl/shared/stw_pixelformat.c')
| -rw-r--r-- | src/gallium/state_trackers/wgl/shared/stw_pixelformat.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/wgl/shared/stw_pixelformat.c b/src/gallium/state_trackers/wgl/shared/stw_pixelformat.c new file mode 100644 index 0000000000..c296744838 --- /dev/null +++ b/src/gallium/state_trackers/wgl/shared/stw_pixelformat.c @@ -0,0 +1,370 @@ +/************************************************************************** + * + * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +#include "main/mtypes.h" +#include "main/context.h" + +#include "pipe/p_format.h" +#include "pipe/p_defines.h" +#include "pipe/p_screen.h" + +#include "util/u_debug.h" + +#include "stw_device.h" +#include "stw_pixelformat.h" +#include "stw_public.h" +#include "stw_tls.h" + + +struct stw_pf_color_info +{ + enum pipe_format format; + struct { + unsigned char red; + unsigned char green; + unsigned char blue; + unsigned char alpha; + } bits; + struct { + unsigned char red; + unsigned char green; + unsigned char blue; + unsigned char alpha; + } shift; +}; + +struct stw_pf_depth_info +{ + enum pipe_format format; + struct { + unsigned char depth; + unsigned char stencil; + } bits; +}; + + +/* NOTE: order matters, since in otherwise equal circumstances the first + * format listed will get chosen */ + +static const struct stw_pf_color_info +stw_pf_color[] = { + /* no-alpha */ + { PIPE_FORMAT_X8R8G8B8_UNORM, { 8, 8, 8, 0}, {16, 8, 0, 0} }, + { PIPE_FORMAT_B8G8R8X8_UNORM, { 8, 8, 8, 0}, { 8, 16, 24, 0} }, + { PIPE_FORMAT_R5G6B5_UNORM, { 5, 6, 5, 0}, {11, 5, 0, 0} }, + /* alpha */ + { PIPE_FORMAT_A8R8G8B8_UNORM, { 8, 8, 8, 8}, {16, 8, 0, 24} }, + { PIPE_FORMAT_B8G8R8A8_UNORM, { 8, 8, 8, 8}, { 8, 16, 24, 0} }, +#if 0 + { PIPE_FORMAT_A2B10G10R10_UNORM, {10, 10, 10, 2}, { 0, 10, 20, 30} }, +#endif + { PIPE_FORMAT_A1R5G5B5_UNORM, { 5, 5, 5, 1}, {10, 5, 0, 15} }, + { PIPE_FORMAT_A4R4G4B4_UNORM, { 4, 4, 4, 4}, {16, 4, 0, 12} } +}; + + +static const struct stw_pf_depth_info +stw_pf_depth_stencil[] = { + /* pure depth */ + { PIPE_FORMAT_Z32_UNORM, {32, 0} }, + { PIPE_FORMAT_Z24X8_UNORM, {24, 0} }, + { PIPE_FORMAT_X8Z24_UNORM, {24, 0} }, + { PIPE_FORMAT_Z16_UNORM, {16, 0} }, + /* pure stencil */ + { PIPE_FORMAT_S8_UNORM, { 0, 8} }, + /* combined depth-stencil */ + { PIPE_FORMAT_S8Z24_UNORM, {24, 8} }, + { PIPE_FORMAT_Z24S8_UNORM, {24, 8} } +}; + + +static const boolean +stw_pf_doublebuffer[] = { + FALSE, + TRUE, +}; + + +const unsigned +stw_pf_multisample[] = { + 0, + 4 +}; + + +static void +stw_pixelformat_add( + struct stw_device *stw_dev, + const struct stw_pf_color_info *color, + const struct stw_pf_depth_info *depth, + unsigned accum, + boolean doublebuffer, + unsigned samples ) +{ + boolean extended = FALSE; + struct stw_pixelformat_info *pfi; + + assert(stw_dev->pixelformat_extended_count < STW_MAX_PIXELFORMATS); + if(stw_dev->pixelformat_extended_count >= STW_MAX_PIXELFORMATS) + return; + + assert(pf_layout( color->format ) == PIPE_FORMAT_LAYOUT_RGBAZS ); + assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_R ) == color->bits.red ); + assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_G ) == color->bits.green ); + assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_B ) == color->bits.blue ); + assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_A ) == color->bits.alpha ); + assert(pf_layout( depth->format ) == PIPE_FORMAT_LAYOUT_RGBAZS ); + assert(pf_get_component_bits( depth->format, PIPE_FORMAT_COMP_Z ) == depth->bits.depth ); + assert(pf_get_component_bits( depth->format, PIPE_FORMAT_COMP_S ) == depth->bits.stencil ); + + pfi = &stw_dev->pixelformats[stw_dev->pixelformat_extended_count]; + + memset(pfi, 0, sizeof *pfi); + + pfi->color_format = color->format; + pfi->depth_stencil_format = depth->format; + + pfi->pfd.nSize = sizeof pfi->pfd; + pfi->pfd.nVersion = 1; + + pfi->pfd.dwFlags = PFD_SUPPORT_OPENGL; + + /* TODO: also support non-native pixel formats */ + pfi->pfd.dwFlags |= PFD_DRAW_TO_WINDOW ; + + if (doublebuffer) + pfi->pfd.dwFlags |= PFD_DOUBLEBUFFER | PFD_SWAP_COPY; + + pfi->pfd.iPixelType = PFD_TYPE_RGBA; + + pfi->pfd.cColorBits = color->bits.red + color->bits.green + color->bits.blue + color->bits.alpha; + pfi->pfd.cRedBits = color->bits.red; + pfi->pfd.cRedShift = color->shift.red; + pfi->pfd.cGreenBits = color->bits.green; + pfi->pfd.cGreenShift = color->shift.green; + pfi->pfd.cBlueBits = color->bits.blue; + pfi->pfd.cBlueShift = color->shift.blue; + pfi->pfd.cAlphaBits = color->bits.alpha; + pfi->pfd.cAlphaShift = color->shift.alpha; + pfi->pfd.cAccumBits = 4*accum; + pfi->pfd.cAccumRedBits = accum; + pfi->pfd.cAccumGreenBits = accum; + pfi->pfd.cAccumBlueBits = accum; + pfi->pfd.cAccumAlphaBits = accum; + pfi->pfd.cDepthBits = depth->bits.depth; + pfi->pfd.cStencilBits = depth->bits.stencil; + pfi->pfd.cAuxBuffers = 0; + pfi->pfd.iLayerType = 0; + pfi->pfd.bReserved = 0; + pfi->pfd.dwLayerMask = 0; + pfi->pfd.dwVisibleMask = 0; + pfi->pfd.dwDamageMask = 0; + + if(samples) { + pfi->numSampleBuffers = 1; + pfi->numSamples = samples; + extended = TRUE; + } + + ++stw_dev->pixelformat_extended_count; + + if(!extended) { + ++stw_dev->pixelformat_count; + assert(stw_dev->pixelformat_count == stw_dev->pixelformat_extended_count); + } +} + +void +stw_pixelformat_init( void ) +{ + struct pipe_screen *screen = stw_dev->screen; + unsigned i, j, k, l; + + assert( !stw_dev->pixelformat_count ); + assert( !stw_dev->pixelformat_extended_count ); + + for(i = 0; i < Elements(stw_pf_multisample); ++i) { + unsigned samples = stw_pf_multisample[i]; + + /* FIXME: re-enabled MSAA when we can query it */ + if(samples) + continue; + + for(j = 0; j < Elements(stw_pf_color); ++j) { + const struct stw_pf_color_info *color = &stw_pf_color[j]; + + if(!screen->is_format_supported(screen, color->format, PIPE_TEXTURE_2D, + PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) + continue; + + for(k = 0; k < Elements(stw_pf_doublebuffer); ++k) { + unsigned doublebuffer = stw_pf_doublebuffer[k]; + + for(l = 0; l < Elements(stw_pf_depth_stencil); ++l) { + const struct stw_pf_depth_info *depth = &stw_pf_depth_stencil[l]; + + if(!screen->is_format_supported(screen, depth->format, PIPE_TEXTURE_2D, + PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0)) + continue; + + stw_pixelformat_add( stw_dev, color, depth, 0, doublebuffer, samples ); + stw_pixelformat_add( stw_dev, color, depth, 16, doublebuffer, samples ); + } + } + } + } + + assert( stw_dev->pixelformat_count <= stw_dev->pixelformat_extended_count ); + assert( stw_dev->pixelformat_extended_count <= STW_MAX_PIXELFORMATS ); +} + +uint +stw_pixelformat_get_count( void ) +{ + return stw_dev->pixelformat_count; +} + +uint +stw_pixelformat_get_extended_count( void ) +{ + return stw_dev->pixelformat_extended_count; +} + +const struct stw_pixelformat_info * +stw_pixelformat_get_info( uint index ) +{ + assert( index < stw_dev->pixelformat_extended_count ); + + return &stw_dev->pixelformats[index]; +} + + +void +stw_pixelformat_visual(GLvisual *visual, + const struct stw_pixelformat_info *pfi ) +{ + memset(visual, 0, sizeof *visual); + _mesa_initialize_visual( + visual, + (pfi->pfd.iPixelType == PFD_TYPE_RGBA) ? GL_TRUE : GL_FALSE, + (pfi->pfd.dwFlags & PFD_DOUBLEBUFFER) ? GL_TRUE : GL_FALSE, + (pfi->pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE, + pfi->pfd.cRedBits, + pfi->pfd.cGreenBits, + pfi->pfd.cBlueBits, + pfi->pfd.cAlphaBits, + (pfi->pfd.iPixelType == PFD_TYPE_COLORINDEX) ? pfi->pfd.cColorBits : 0, + pfi->pfd.cDepthBits, + pfi->pfd.cStencilBits, + pfi->pfd.cAccumRedBits, + pfi->pfd.cAccumGreenBits, + pfi->pfd.cAccumBlueBits, + pfi->pfd.cAccumAlphaBits, + pfi->numSamples ); +} + + +int +stw_pixelformat_describe( + HDC hdc, + int iPixelFormat, + UINT nBytes, + LPPIXELFORMATDESCRIPTOR ppfd ) +{ + uint count; + uint index; + const struct stw_pixelformat_info *pfi; + + (void) hdc; + + count = stw_pixelformat_get_extended_count(); + index = (uint) iPixelFormat - 1; + + if (ppfd == NULL) + return count; + if (index >= count || nBytes != 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_count(); + bestindex = count; + bestdelta = ~0U; + + for (index = 0; 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; + } + } + + if (bestindex == count) + return 0; + + return bestindex + 1; +} |