/** * Choose the pixel format for the given visual. * This will tell the gallium driver how to pack pixel data into * drawing surfaces. */ static GLuint choose_pixel_format(XMesaVisual v) { boolean native_byte_order = (host_byte_order() == ImageByteOrder(v->display)); if ( GET_REDMASK(v) == 0x0000ff && GET_GREENMASK(v) == 0x00ff00 && GET_BLUEMASK(v) == 0xff0000 && v->BitsPerPixel == 32) { if (native_byte_order) { /* no byteswapping needed */ return PIPE_FORMAT_R8G8B8A8_UNORM; } else { return PIPE_FORMAT_A8B8G8R8_UNORM; } } else if ( GET_REDMASK(v) == 0xff0000 && GET_GREENMASK(v) == 0x00ff00 && GET_BLUEMASK(v) == 0x0000ff && v->BitsPerPixel == 32) { if (native_byte_order) { /* no byteswapping needed */ return PIPE_FORMAT_B8G8R8A8_UNORM; } else { return PIPE_FORMAT_A8R8G8B8_UNORM; } } else if ( GET_REDMASK(v) == 0x0000ff00 && GET_GREENMASK(v) == 0x00ff0000 && GET_BLUEMASK(v) == 0xff000000 && v->BitsPerPixel == 32) { if (native_byte_order) { /* no byteswapping needed */ return PIPE_FORMAT_A8R8G8B8_UNORM; } else { return PIPE_FORMAT_B8G8R8A8_UNORM; } } else if ( GET_REDMASK(v) == 0xf800 && GET_GREENMASK(v) == 0x07e0 && GET_BLUEMASK(v) == 0x001f && native_byte_order && v->BitsPerPixel == 16) { /* 5-6-5 RGB */ return PIPE_FORMAT_B5G6R5_UNORM; } return PIPE_FORMAT_NONE; }
/* Implements glColorMask() */ static void color_mask(GLcontext *ctx, GLboolean rmask, GLboolean gmask, GLboolean bmask, GLboolean amask) { const XMesaContext xmesa = XMESA_CONTEXT(ctx); XMesaBuffer xmbuf; const int xclass = xmesa->xm_visual->mesa_visual.visualType; (void) amask; if (ctx->DrawBuffer->Name != 0) return; xmbuf = XMESA_BUFFER(ctx->DrawBuffer); if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { unsigned long m; if (rmask && gmask && bmask) { m = ((unsigned long)~0L); } else { m = 0; if (rmask) m |= GET_REDMASK(xmesa->xm_visual); if (gmask) m |= GET_GREENMASK(xmesa->xm_visual); if (bmask) m |= GET_BLUEMASK(xmesa->xm_visual); } XMesaSetPlaneMask( xmesa->display, xmbuf->cleargc, m ); XMesaSetPlaneMask( xmesa->display, xmbuf->gc, m ); } }
/* * Create a new X/Mesa visual. * Input: display - X11 display * visinfo - an XVisualInfo pointer * rgb_flag - GL_TRUE = RGB mode, * GL_FALSE = color index mode * alpha_flag - alpha buffer requested? * db_flag - GL_TRUE = double-buffered, * GL_FALSE = single buffered * stereo_flag - stereo visual? * ximage_flag - GL_TRUE = use an XImage for back buffer, * GL_FALSE = use an off-screen pixmap for back buffer * depth_size - requested bits/depth values, or zero * stencil_size - requested bits/stencil values, or zero * accum_red_size - requested bits/red accum values, or zero * accum_green_size - requested bits/green accum values, or zero * accum_blue_size - requested bits/blue accum values, or zero * accum_alpha_size - requested bits/alpha accum values, or zero * num_samples - number of samples/pixel if multisampling, or zero * level - visual level, usually 0 * visualCaveat - ala the GLX extension, usually GLX_NONE * Return; a new XMesaVisual or 0 if error. */ PUBLIC XMesaVisual XMesaCreateVisual( Display *display, XVisualInfo * visinfo, GLboolean rgb_flag, GLboolean alpha_flag, GLboolean db_flag, GLboolean stereo_flag, GLboolean ximage_flag, GLint depth_size, GLint stencil_size, GLint accum_red_size, GLint accum_green_size, GLint accum_blue_size, GLint accum_alpha_size, GLint num_samples, GLint level, GLint visualCaveat ) { XMesaDisplay xmdpy = xmesa_init_display(display); XMesaVisual v; GLint red_bits, green_bits, blue_bits, alpha_bits; if (!xmdpy) return NULL; /* For debugging only */ if (_mesa_getenv("MESA_XSYNC")) { /* This makes debugging X easier. * In your debugger, set a breakpoint on _XError to stop when an * X protocol error is generated. */ XSynchronize( display, 1 ); } v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); if (!v) { return NULL; } v->display = display; /* Save a copy of the XVisualInfo struct because the user may Xfree() * the struct but we may need some of the information contained in it * at a later time. */ v->visinfo = (XVisualInfo *) malloc(sizeof(*visinfo)); if (!v->visinfo) { free(v); return NULL; } memcpy(v->visinfo, visinfo, sizeof(*visinfo)); v->ximage_flag = ximage_flag; v->mesa_visual.redMask = visinfo->red_mask; v->mesa_visual.greenMask = visinfo->green_mask; v->mesa_visual.blueMask = visinfo->blue_mask; v->visualID = visinfo->visualid; v->screen = visinfo->screen; #if !(defined(__cplusplus) || defined(c_plusplus)) v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); #else v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); #endif v->mesa_visual.visualRating = visualCaveat; if (alpha_flag) v->mesa_visual.alphaBits = 8; (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); { const int xclass = v->visualType; if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { red_bits = _mesa_bitcount(GET_REDMASK(v)); green_bits = _mesa_bitcount(GET_GREENMASK(v)); blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); } else { /* this is an approximation */ int depth; depth = v->visinfo->depth; red_bits = depth / 3; depth -= red_bits; green_bits = depth / 2; depth -= green_bits; blue_bits = depth; alpha_bits = 0; assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); } alpha_bits = v->mesa_visual.alphaBits; } /* initialize visual */ { struct gl_config *vis = &v->mesa_visual; vis->rgbMode = GL_TRUE; vis->doubleBufferMode = db_flag; vis->stereoMode = stereo_flag; vis->redBits = red_bits; vis->greenBits = green_bits; vis->blueBits = blue_bits; vis->alphaBits = alpha_bits; vis->rgbBits = red_bits + green_bits + blue_bits; vis->indexBits = 0; vis->depthBits = depth_size; vis->stencilBits = stencil_size; vis->accumRedBits = accum_red_size; vis->accumGreenBits = accum_green_size; vis->accumBlueBits = accum_blue_size; vis->accumAlphaBits = accum_alpha_size; vis->haveAccumBuffer = accum_red_size > 0; vis->haveDepthBuffer = depth_size > 0; vis->haveStencilBuffer = stencil_size > 0; vis->numAuxBuffers = 0; vis->level = 0; vis->sampleBuffers = 0; vis->samples = 0; } v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK; if (db_flag) v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK; if (stereo_flag) { v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK; if (db_flag) v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK; } v->stvis.color_format = choose_pixel_format(v); if (v->stvis.color_format == PIPE_FORMAT_NONE) { free(v->visinfo); free(v); return NULL; } v->stvis.depth_stencil_format = choose_depth_stencil_format(xmdpy, depth_size, stencil_size); v->stvis.accum_format = (accum_red_size + accum_green_size + accum_blue_size + accum_alpha_size) ? PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE; v->stvis.samples = num_samples; v->stvis.render_buffer = ST_ATTACHMENT_INVALID; /* XXX minor hack */ v->mesa_visual.level = level; return v; }
/* * Create a new X/Mesa visual. * Input: display - X11 display * visinfo - an XVisualInfo pointer * rgb_flag - GL_TRUE = RGB mode, * GL_FALSE = color index mode * alpha_flag - alpha buffer requested? * db_flag - GL_TRUE = double-buffered, * GL_FALSE = single buffered * stereo_flag - stereo visual? * ximage_flag - GL_TRUE = use an XImage for back buffer, * GL_FALSE = use an off-screen pixmap for back buffer * depth_size - requested bits/depth values, or zero * stencil_size - requested bits/stencil values, or zero * accum_red_size - requested bits/red accum values, or zero * accum_green_size - requested bits/green accum values, or zero * accum_blue_size - requested bits/blue accum values, or zero * accum_alpha_size - requested bits/alpha accum values, or zero * num_samples - number of samples/pixel if multisampling, or zero * level - visual level, usually 0 * visualCaveat - ala the GLX extension, usually GLX_NONE * Return; a new XMesaVisual or 0 if error. */ PUBLIC XMesaVisual XMesaCreateVisual( XMesaDisplay *display, XMesaVisualInfo visinfo, GLboolean rgb_flag, GLboolean alpha_flag, GLboolean db_flag, GLboolean stereo_flag, GLboolean ximage_flag, GLint depth_size, GLint stencil_size, GLint accum_red_size, GLint accum_green_size, GLint accum_blue_size, GLint accum_alpha_size, GLint num_samples, GLint level, GLint visualCaveat ) { char *gamma; XMesaVisual v; GLint red_bits, green_bits, blue_bits, alpha_bits; /* For debugging only */ if (_mesa_getenv("MESA_XSYNC")) { /* This makes debugging X easier. * In your debugger, set a breakpoint on _XError to stop when an * X protocol error is generated. */ XSynchronize( display, 1 ); } /* Color-index rendering not supported. */ if (!rgb_flag) return NULL; v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); if (!v) { return NULL; } v->display = display; /* Save a copy of the XVisualInfo struct because the user may Xfree() * the struct but we may need some of the information contained in it * at a later time. */ v->visinfo = (XVisualInfo *) malloc(sizeof(*visinfo)); if(!v->visinfo) { free(v); return NULL; } memcpy(v->visinfo, visinfo, sizeof(*visinfo)); /* check for MESA_GAMMA environment variable */ gamma = _mesa_getenv("MESA_GAMMA"); if (gamma) { v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); if (v->RedGamma<=0.0) v->RedGamma = 1.0; if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; } else { v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; } v->ximage_flag = ximage_flag; v->mesa_visual.redMask = visinfo->red_mask; v->mesa_visual.greenMask = visinfo->green_mask; v->mesa_visual.blueMask = visinfo->blue_mask; v->visualID = visinfo->visualid; v->screen = visinfo->screen; #if !(defined(__cplusplus) || defined(c_plusplus)) v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); #else v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); #endif v->mesa_visual.visualRating = visualCaveat; if (alpha_flag) v->mesa_visual.alphaBits = 8; (void) initialize_visual_and_buffer( v, NULL, 0, 0 ); { const int xclass = v->visualType; if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { red_bits = _mesa_bitcount(GET_REDMASK(v)); green_bits = _mesa_bitcount(GET_GREENMASK(v)); blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); } else { /* this is an approximation */ int depth; depth = GET_VISUAL_DEPTH(v); red_bits = depth / 3; depth -= red_bits; green_bits = depth / 2; depth -= green_bits; blue_bits = depth; alpha_bits = 0; assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); } alpha_bits = v->mesa_visual.alphaBits; } if (!_mesa_initialize_visual(&v->mesa_visual, db_flag, stereo_flag, red_bits, green_bits, blue_bits, alpha_bits, depth_size, stencil_size, accum_red_size, accum_green_size, accum_blue_size, accum_alpha_size, 0)) { FREE(v); return NULL; } /* XXX minor hack */ v->mesa_visual.level = level; return v; }
/** * Setup RGB rendering for a window with a True/DirectColor visual. */ static void setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) { unsigned long rmask, gmask, bmask; (void) buffer; (void) cmap; /* Compute red multiplier (mask) and bit shift */ v->rshift = 0; rmask = GET_REDMASK(v); while ((rmask & 1)==0) { v->rshift++; rmask = rmask >> 1; } /* Compute green multiplier (mask) and bit shift */ v->gshift = 0; gmask = GET_GREENMASK(v); while ((gmask & 1)==0) { v->gshift++; gmask = gmask >> 1; } /* Compute blue multiplier (mask) and bit shift */ v->bshift = 0; bmask = GET_BLUEMASK(v); while ((bmask & 1)==0) { v->bshift++; bmask = bmask >> 1; } /* * Compute component-to-pixel lookup tables and dithering kernel */ { static GLubyte kernel[16] = { 0*16, 8*16, 2*16, 10*16, 12*16, 4*16, 14*16, 6*16, 3*16, 11*16, 1*16, 9*16, 15*16, 7*16, 13*16, 5*16, }; GLint rBits = _mesa_bitcount(rmask); GLint gBits = _mesa_bitcount(gmask); GLint bBits = _mesa_bitcount(bmask); GLint maxBits; GLuint i; /* convert pixel components in [0,_mask] to RGB values in [0,255] */ for (i=0; i<=rmask; i++) v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); for (i=0; i<=gmask; i++) v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); for (i=0; i<=bmask; i++) v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); /* convert RGB values from [0,255] to pixel components */ for (i=0;i<256;i++) { GLint r = gamma_adjust(v->RedGamma, i, 255); GLint g = gamma_adjust(v->GreenGamma, i, 255); GLint b = gamma_adjust(v->BlueGamma, i, 255); v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; } /* overflow protection */ for (i=256;i<512;i++) { v->RtoPixel[i] = v->RtoPixel[255]; v->GtoPixel[i] = v->GtoPixel[255]; v->BtoPixel[i] = v->BtoPixel[255]; } /* setup dithering kernel */ maxBits = rBits; if (gBits > maxBits) maxBits = gBits; if (bBits > maxBits) maxBits = bBits; for (i=0;i<16;i++) { v->Kernel[i] = kernel[i] >> maxBits; } v->undithered_pf = PF_Truecolor; v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; } /* * Now check for TrueColor visuals which we can optimize. */ if ( GET_REDMASK(v) ==0x0000ff && GET_GREENMASK(v)==0x00ff00 && GET_BLUEMASK(v) ==0xff0000 && CHECK_BYTE_ORDER(v) && v->BitsPerPixel==32 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { /* common 32 bpp config used on SGI, Sun */ v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ } else if (GET_REDMASK(v) == 0xff0000 && GET_GREENMASK(v)== 0x00ff00 && GET_BLUEMASK(v) == 0x0000ff && CHECK_BYTE_ORDER(v) && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ if (v->BitsPerPixel==32) { /* if 32 bpp, and visual indicates 8 bpp alpha channel */ if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ else v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ } else if (v->BitsPerPixel == 24) { v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ } } else if (GET_REDMASK(v) ==0xf800 && GET_GREENMASK(v)==0x07e0 && GET_BLUEMASK(v) ==0x001f && CHECK_BYTE_ORDER(v) && v->BitsPerPixel==16 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { /* 5-6-5 RGB */ v->undithered_pf = PF_5R6G5B; v->dithered_pf = PF_Dither_5R6G5B; } }