/* * Mesa 3-D graphics library * Version: 6.3 * * Copyright (C) 1999-2005 Brian Paul 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, sublicense, * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL * BRIAN PAUL 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. */ /* * Off-Screen Mesa rendering / Rendering into client memory space * * Note on thread safety: this driver is thread safe. All * functions are reentrant. The notion of current context is * managed by the core _mesa_make_current() and _mesa_get_current_context() * functions. Those functions are thread-safe. */ #include "glheader.h" #include "GL/osmesa.h" #include "buffers.h" #include "bufferobj.h" #include "context.h" #include "colormac.h" #include "depth.h" #include "extensions.h" #include "imports.h" #include "macros.h" #include "matrix.h" #include "mtypes.h" #include "texformat.h" #include "texobj.h" #include "teximage.h" #include "texstore.h" #include "array_cache/acache.h" #include "swrast/swrast.h" #include "swrast_setup/swrast_setup.h" #include "swrast/s_context.h" #include "swrast/s_depth.h" #include "swrast/s_lines.h" #include "swrast/s_triangle.h" #include "tnl/tnl.h" #include "tnl/t_context.h" #include "tnl/t_pipeline.h" #include "drivers/common/driverfuncs.h" /* * This is the OS/Mesa context struct. * Notice how it includes a GLcontext. By doing this we're mimicking * C++ inheritance/derivation. * Later, we can cast a GLcontext pointer into an OSMesaContext pointer * or vice versa. */ struct osmesa_context { GLcontext mesa; /* The core GL/Mesa context */ GLvisual *gl_visual; /* Describes the buffers */ GLframebuffer *gl_buffer; /* Depth, stencil, accum, etc buffers */ GLenum format; /* either GL_RGBA or GL_COLOR_INDEX */ void *buffer; /* the image buffer */ GLint width, height; /* size of image buffer */ GLint rowlength; /* number of pixels per row */ GLint userRowLength; /* user-specified number of pixels per row */ GLint rshift, gshift; /* bit shifts for RGBA formats */ GLint bshift, ashift; GLint rInd, gInd, bInd, aInd;/* index offsets for RGBA formats */ GLchan *rowaddr[MAX_HEIGHT]; /* address of first pixel in each image row */ GLboolean yup; /* TRUE -> Y increases upward */ /* FALSE -> Y increases downward */ }; /* Just cast, since we're using structure containment */ #define OSMESA_CONTEXT(ctx) ((OSMesaContext) (ctx->DriverCtx)) /**********************************************************************/ /*** Private Device Driver Functions ***/ /**********************************************************************/ static const GLubyte * get_string( GLcontext *ctx, GLenum name ) { (void) ctx; switch (name) { case GL_RENDERER: #if CHAN_BITS == 32 return (const GLubyte *) "Mesa OffScreen32"; #elif CHAN_BITS == 16 return (const GLubyte *) "Mesa OffScreen16"; #else return (const GLubyte *) "Mesa OffScreen"; #endif default: return NULL; } } static void osmesa_update_state( GLcontext *ctx, GLuint new_state ) { /* easy - just propogate */ _swrast_InvalidateState( ctx, new_state ); _swsetup_InvalidateState( ctx, new_state ); _ac_InvalidateState( ctx, new_state ); _tnl_InvalidateState( ctx, new_state ); } static void set_buffer( GLcontext *ctx, GLframebuffer *buffer, GLuint bufferBit ) { /* separate read buffer not supported */ ASSERT(buffer == ctx->DrawBuffer); ASSERT(bufferBit == DD_FRONT_LEFT_BIT); } static void get_buffer_size( GLframebuffer *buffer, GLuint *width, GLuint *height ) { /* don't use GET_CURRENT_CONTEXT(ctx) here - it's a problem on Windows */ GLcontext *ctx = (GLcontext *) _glapi_get_context(); (void) buffer; if (ctx) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); *width = osmesa->width; *height = osmesa->height; } } static void clear( GLcontext *ctx, GLbitfield mask, GLboolean all, GLint x, GLint y, GLint width, GLint height ) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask; /* sanity check - we only have a front-left buffer */ ASSERT((mask & (DD_FRONT_RIGHT_BIT | DD_BACK_LEFT_BIT | DD_BACK_RIGHT_BIT)) == 0); /* use optimized clear for common cases (clear whole buffer to black) */ if (mask & DD_FRONT_LEFT_BIT) { if (osmesa->format == OSMESA_COLOR_INDEX) { if (ctx->Color.ClearIndex == 0 && ctx->Color.IndexMask == (GLuint) ~0 && osmesa->rowlength == osmesa->width && all) { /* clear whole buffer to zeros */ _mesa_bzero(osmesa->buffer, osmesa->width * osmesa->height * sizeof(GLchan)); mask &= ~DD_FRONT_LEFT_BIT; } } else { /* RGB[A] format */ if (*colorMask == 0xffffffff && ctx->Color.ClearColor[0] == 0.0F && ctx->Color.ClearColor[1] == 0.0F && ctx->Color.ClearColor[2] == 0.0F && ctx->Color.ClearColor[3] == 0.0F && osmesa->rowlength == osmesa->width && all) { GLint bytesPerPixel; /* clear whole buffer to black */ if (osmesa->format == OSMESA_RGBA || osmesa->format == OSMESA_BGRA || osmesa->format == OSMESA_ARGB) bytesPerPixel = 4 * sizeof(GLchan); else if (osmesa->format == OSMESA_RGB || osmesa->format == OSMESA_BGR) bytesPerPixel = 3 * sizeof(GLchan); else if (osmesa->format == OSMESA_RGB_565) bytesPerPixel = sizeof(GLushort); else { _mesa_problem(ctx, "bad pixel format in osmesa_clear()"); return; } _mesa_bzero(osmesa->buffer, bytesPerPixel * osmesa->width * osmesa->height); mask &= ~DD_FRONT_LEFT_BIT; } } } if (mask) { /* software fallback (spans) for everything else. */ _swrast_Clear(ctx, mask, all, x, y, width, height); } } /**********************************************************************/ /***** Read/write spans/arrays of pixels *****/ /**********************************************************************/ /* RGBA */ #define NAME(PREFIX) PREFIX##_RGBA #define SPAN_VARS \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INIT_PIXEL_PTR(P, X, Y) \ GLchan *P = osmesa->rowaddr[Y] + 4 * (X) #define INC_PIXEL_PTR(P) P += 4 #if CHAN_TYPE == GL_FLOAT #define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ P[0] = MAX2((R), 0.0F); \ P[1] = MAX2((G), 0.0F); \ P[2] = MAX2((B), 0.0F); \ P[3] = CHAN_MAXF #define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ P[0] = MAX2((R), 0.0F); \ P[1] = MAX2((G), 0.0F); \ P[2] = MAX2((B), 0.0F); \ P[3] = CLAMP((A), 0.0F, CHAN_MAXF) #else #define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ P[0] = R; P[1] = G; P[2] = B; P[3] = CHAN_MAX #define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ P[0] = R; P[1] = G; P[2] = B; P[3] = A #endif #define FETCH_RGBA_PIXEL(R, G, B, A, P) \ R = P[0]; G = P[1]; B = P[2]; A = P[3] #include "swrast/s_spantemp.h" /* BGRA */ #define NAME(PREFIX) PREFIX##_BGRA #define SPAN_VARS \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INIT_PIXEL_PTR(P, X, Y) \ GLchan *P = osmesa->rowaddr[Y] + 4 * (X) #define INC_PIXEL_PTR(P) P += 4 #define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ P[2] = R; P[1] = G; P[0] = B; P[3] = CHAN_MAX #define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ P[2] = R; P[1] = G; P[0] = B; P[3] = A #define FETCH_RGBA_PIXEL(R, G, B, A, P) \ R = P[2]; G = P[1]; B = P[0]; A = P[3] #include "swrast/s_spantemp.h" /* ARGB */ #define NAME(PREFIX) PREFIX##_ARGB #define SPAN_VARS \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INIT_PIXEL_PTR(P, X, Y) \ GLchan *P = osmesa->rowaddr[Y] + 4 * (X) #define INC_PIXEL_PTR(P) P += 4 #define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ P[1] = R; P[2] = G; P[3] = B; P[0] = CHAN_MAX #define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ P[1] = R; P[2] = G; P[3] = B; P[0] = A #define FETCH_RGBA_PIXEL(R, G, B, A, P) \ R = P[1]; G = P[2]; B = P[3]; A = P[0] #include "swrast/s_spantemp.h" /* RGB */ #define NAME(PREFIX) PREFIX##_RGB #define SPAN_VARS \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INIT_PIXEL_PTR(P, X, Y) \ GLchan *P = osmesa->rowaddr[Y] + 3 * (X) #define INC_PIXEL_PTR(P) P += 3 #define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ P[0] = R; P[1] = G; P[2] = B #define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ P[0] = R; P[1] = G; P[2] = B #define FETCH_RGBA_PIXEL(R, G, B, A, P) \ R = P[0]; G = P[1]; B = P[2]; A = CHAN_MAX #include "swrast/s_spantemp.h" /* BGR */ #define NAME(PREFIX) PREFIX##_BGR #define SPAN_VARS \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INIT_PIXEL_PTR(P, X, Y) \ GLchan *P = osmesa->rowaddr[Y] + 3 * (X) #define INC_PIXEL_PTR(P) P += 3 #define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ P[0] = B; P[1] = G; P[2] = R #define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ P[0] = B; P[1] = G; P[2] = R #define FETCH_RGBA_PIXEL(R, G, B, A, P) \ B = P[0]; G = P[1]; R = P[2]; A = CHAN_MAX #include "swrast/s_spantemp.h" /* 16-bit BGR */ #if CHAN_TYPE == GL_UNSIGNED_BYTE #define NAME(PREFIX) PREFIX##_RGB_565 #define SPAN_VARS \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INIT_PIXEL_PTR(P, X, Y) \ GLushort *P = (GLushort *) osmesa->rowaddr[Y] + (X) #define INC_PIXEL_PTR(P) P += 1 #define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ *P = ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) ) #define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ *P = ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) ) #define FETCH_RGBA_PIXEL(R, G, B, A, P) \ R = ( (((*P) >> 8) & 0xf8) | (((*P) >> 11) & 0x7) ); \ G = ( (((*P) >> 3) & 0xfc) | (((*P) >> 5) & 0x3) ); \ B = ( (((*P) << 3) & 0xf8) | (((*P) ) & 0x7) ); \ A = CHAN_MAX #include "swrast/s_spantemp.h" #endif /* color index */ #define NAME(PREFIX) PREFIX##_CI #define SPAN_VARS \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INIT_PIXEL_PTR(P, X, Y) \ GLchan *P = osmesa->rowaddr[Y] + (X) #define INC_PIXEL_PTR(P) P += 1 #define STORE_CI_PIXEL(P, CI) \ P[0] = CI #define FETCH_CI_PIXEL(CI, P) \ CI = P[0] #include "swrast/s_spantemp.h" /**********************************************************************/ /***** Optimized line rendering *****/ /**********************************************************************/ #if CHAN_TYPE == GL_FLOAT #define PACK_RGBA(DST, R, G, B, A) \ do { \ (DST)[0] = MAX2( R, 0.0F ); \ (DST)[1] = MAX2( G, 0.0F ); \ (DST)[2] = MAX2( B, 0.0F ); \ (DST)[3] = CLAMP(A, 0.0F, CHAN_MAXF);\ } while (0) #else #define PACK_RGBA(DST, R, G, B, A) \ do { \ (DST)[osmesa->rInd] = R; \ (DST)[osmesa->gInd] = G; \ (DST)[osmesa->bInd] = B; \ (DST)[osmesa->aInd] = A; \ } while (0) #endif #define PACK_RGB(DST, R, G, B) \ do { \ (DST)[0] = R; \ (DST)[1] = G; \ (DST)[2] = B; \ } while (0) #define PACK_BGR(DST, R, G, B) \ do { \ (DST)[0] = B; \ (DST)[1] = G; \ (DST)[2] = R; \ } while (0) #define PACK_RGB_565(DST, R, G, B) \ do { \ (DST) = (((int) (R) << 8) & 0xf800) | (((int) (G) << 3) & 0x7e0) | ((int) (B) >> 3);\ } while (0) #define UNPACK_RED(P) ( (P)[osmesa->rInd] ) #define UNPACK_GREEN(P) ( (P)[osmesa->gInd] ) #define UNPACK_BLUE(P) ( (P)[osmesa->bInd] ) #define UNPACK_ALPHA(P) ( (P)[osmesa->aInd] ) #define PIXELADDR1(X,Y) (osmesa->rowaddr[Y] + (X)) #define PIXELADDR2(X,Y) (osmesa->rowaddr[Y] + 2 * (X)) #define PIXELADDR3(X,Y) (osmesa->rowaddr[Y] + 3 * (X)) #define PIXELADDR4(X,Y) (osmesa->rowaddr[Y] + 4 * (X)) /* * Draw a flat-shaded, RGB line into an osmesa buffer. */ #define NAME flat_rgba_line #define CLIP_HACK 1 #define SETUP_CODE \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); \ const GLchan *color = vert1->color; #define PLOT(X, Y) \ do { \ GLchan *p = PIXELADDR4(X, Y); \ PACK_RGBA(p, color[0], color[1], color[2], color[3]); \ } while (0) #ifdef WIN32 #include "..\swrast\s_linetemp.h" #else #include "swrast/s_linetemp.h" #endif /* * Draw a flat-shaded, Z-less, RGB line into an osmesa buffer. */ #define NAME flat_rgba_z_line #define CLIP_HACK 1 #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define SETUP_CODE \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); \ const GLchan *color = vert1->color; #define PLOT(X, Y) \ do { \ if (Z < *zPtr) { \ GLchan *p = PIXELADDR4(X, Y); \ PACK_RGBA(p, color[RCOMP], color[GCOMP], \ color[BCOMP], color[ACOMP]); \ *zPtr = Z; \ } \ } while (0) #ifdef WIN32 #include "..\swrast\s_linetemp.h" #else #include "swrast/s_linetemp.h" #endif /* * Analyze context state to see if we can provide a fast line drawing * function, like those in lines.c. Otherwise, return NULL. */ static swrast_line_func osmesa_choose_line_function( GLcontext *ctx ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const SWcontext *swrast = SWRAST_CONTEXT(ctx); if (CHAN_BITS != 8) return NULL; if (ctx->RenderMode != GL_RENDER) return NULL; if (ctx->Line.SmoothFlag) return NULL; if (ctx->Texture._EnabledUnits) return NULL; if (ctx->Light.ShadeModel != GL_FLAT) return NULL; if (ctx->Line.Width != 1.0F) return NULL; if (ctx->Line.StippleFlag) return NULL; if (ctx->Line.SmoothFlag) return NULL; if (osmesa->format != OSMESA_RGBA && osmesa->format != OSMESA_BGRA && osmesa->format != OSMESA_ARGB) return NULL; if (swrast->_RasterMask==DEPTH_BIT && ctx->Depth.Func==GL_LESS && ctx->Depth.Mask==GL_TRUE && ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS) { return (swrast_line_func) flat_rgba_z_line; } if (swrast->_RasterMask == 0) { return (swrast_line_func) flat_rgba_line; } return (swrast_line_func) NULL; } /**********************************************************************/ /***** Optimized triangle rendering *****/ /**********************************************************************/ /* * Smooth-shaded, z-less triangle, RGBA color. */ #define NAME smooth_rgba_z_triangle #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define SETUP_CODE \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define RENDER_SPAN( span ) \ GLuint i; \ GLchan *img = PIXELADDR4(span.x, span.y); \ for (i = 0; i < span.end; i++, img += 4) { \ const GLdepth z = FixedToDepth(span.z); \ if (z < zRow[i]) { \ PACK_RGBA(img, FixedToChan(span.red), \ FixedToChan(span.green), FixedToChan(span.blue), \ FixedToChan(span.alpha)); \ zRow[i] = z; \ } \ span.red += span.redStep; \ span.green += span.greenStep; \ span.blue += span.blueStep; \ span.alpha += span.alphaStep; \ span.z += span.zStep; \ } #ifdef WIN32 #include "..\swrast\s_tritemp.h" #else #include "swrast/s_tritemp.h" #endif /* * Flat-shaded, z-less triangle, RGBA color. */ #define NAME flat_rgba_z_triangle #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define SETUP_CODE \ const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); \ GLuint pixel; \ PACK_RGBA((GLchan *) &pixel, v2->color[0], v2->color[1], \ v2->color[2], v2->color[3]); #define RENDER_SPAN( span ) \ GLuint i; \ GLuint *img = (GLuint *) PIXELADDR4(span.x, span.y); \ for (i = 0; i < span.end; i++) { \ const GLdepth z = FixedToDepth(span.z); \ if (z < zRow[i]) { \ img[i] = pixel; \ zRow[i] = z; \ } \ span.z += span.zStep; \ } #ifdef WIN32 #include "..\swrast\s_tritemp.h" #else #include "swrast/s_tritemp.h" #endif /* * Return pointer to an accelerated triangle function if possible. */ static swrast_tri_func osmesa_choose_triangle_function( GLcontext *ctx ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const SWcontext *swrast = SWRAST_CONTEXT(ctx); if (CHAN_BITS != 8) return (swrast_tri_func) NULL; if (ctx->RenderMode != GL_RENDER) return (swrast_tri_func) NULL; if (ctx->Polygon.SmoothFlag) return (swrast_tri_func) NULL; if (ctx->Polygon.StippleFlag) return (swrast_tri_func) NULL; if (ctx->Texture._EnabledUnits) return (swrast_tri_func) NULL; if (osmesa->format != OSMESA_RGBA && osmesa->format != OSMESA_BGRA && osmesa->format != OSMESA_ARGB) return (swrast_tri_func) NULL; if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) return (swrast_tri_func) NULL; if (swrast->_RasterMask == DEPTH_BIT && ctx->Depth.Func == GL_LESS && ctx->Depth.Mask == GL_TRUE && ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS) { if (ctx->Light.ShadeModel == GL_SMOOTH) { return (swrast_tri_func) smooth_rgba_z_triangle; } else { return (swrast_tri_func) flat_rgba_z_triangle; } } return (swrast_tri_func) NULL; } /* Override for the swrast triangle-selection function. Try to use one * of our internal triangle functions, otherwise fall back to the * standard swrast functions. */ static void osmesa_choose_triangle( GLcontext *ctx ) { SWcontext *swrast = SWRAST_CONTEXT(ctx); swrast->Triangle = osmesa_choose_triangle_function( ctx ); if (!swrast->Triangle) _swrast_choose_triangle( ctx ); } static void osmesa_choose_line( GLcontext *ctx ) { SWcontext *swrast = SWRAST_CONTEXT(ctx); swrast->Line = osmesa_choose_line_function( ctx ); if (!swrast->Line) _swrast_choose_line( ctx ); } #define OSMESA_NEW_LINE (_NEW_LINE | \ _NEW_TEXTURE | \ _NEW_LIGHT | \ _NEW_DEPTH | \ _NEW_RENDERMODE | \ _SWRAST_NEW_RASTERMASK) #define OSMESA_NEW_TRIANGLE (_NEW_POLYGON | \ _NEW_TEXTURE | \ _NEW_LIGHT | \ _NEW_DEPTH | \ _NEW_RENDERMODE | \ _SWRAST_NEW_RASTERMASK) /* one-time, per-context initialization */ static void hook_in_driver_functions( GLcontext *ctx ) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); SWcontext *swrast = SWRAST_CONTEXT( ctx ); struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference( ctx ); TNLcontext *tnl = TNL_CONTEXT(ctx); ASSERT((void *) osmesa == (void *) ctx->DriverCtx); /* use default TCL pipeline */ tnl->Driver.RunPipeline = _tnl_run_pipeline; swdd->SetBuffer = set_buffer; /* RGB(A) span/pixel functions */ if (osmesa->format == OSMESA_RGB) { swdd->WriteRGBASpan = write_rgba_span_RGB; swdd->WriteRGBSpan = write_rgb_span_RGB; swdd->WriteMonoRGBASpan = write_monorgba_span_RGB; swdd->WriteRGBAPixels = write_rgba_pixels_RGB; swdd->WriteMonoRGBAPixels = write_monorgba_pixels_RGB; swdd->ReadRGBASpan = read_rgba_span_RGB; swdd->ReadRGBAPixels = read_rgba_pixels_RGB; } else if (osmesa->format == OSMESA_BGR) { swdd->WriteRGBASpan = write_rgba_span_BGR; swdd->WriteRGBSpan = write_rgb_span_BGR; swdd->WriteMonoRGBASpan = write_monorgba_span_BGR; swdd->WriteRGBAPixels = write_rgba_pixels_BGR; swdd->WriteMonoRGBAPixels = write_monorgba_pixels_BGR; swdd->ReadRGBASpan = read_rgba_span_BGR; swdd->ReadRGBAPixels = read_rgba_pixels_BGR; } #if CHAN_TYPE == GL_UNSIGNED_BYTE else if (osmesa->format == OSMESA_RGB_565) { swdd->WriteRGBASpan = write_rgba_span_RGB_565; swdd->WriteRGBSpan = write_rgb_span_RGB_565; swdd->WriteMonoRGBASpan = write_monorgba_span_RGB_565; swdd->WriteRGBAPixels = write_rgba_pixels_RGB_565; swdd->WriteMonoRGBAPixels = write_monorgba_pixels_RGB_565; swdd->ReadRGBASpan = read_rgba_span_RGB_565; swdd->ReadRGBAPixels = read_rgba_pixels_RGB_565; } #endif else if (osmesa->format == OSMESA_RGBA) { swdd->WriteRGBASpan = write_rgba_span_RGBA; swdd->WriteRGBSpan = write_rgb_span_RGBA; swdd->WriteMonoRGBASpan = write_monorgba_span_RGBA; swdd->WriteRGBAPixels = write_rgba_pixels_RGBA; swdd->WriteMonoRGBAPixels = write_monorgba_pixels_RGBA; swdd->ReadRGBASpan = read_rgba_span_RGBA; swdd->ReadRGBAPixels = read_rgba_pixels_RGBA; } else if (osmesa->format == OSMESA_BGRA) { swdd->WriteRGBASpan = write_rgba_span_BGRA; swdd->WriteRGBSpan = write_rgb_span_BGRA; swdd->WriteMonoRGBASpan = write_monorgba_span_BGRA; swdd->WriteRGBAPixels = write_rgba_pixels_BGRA; swdd->WriteMonoRGBAPixels = write_monorgba_pixels_BGRA; swdd->ReadRGBASpan = read_rgba_span_BGRA; swdd->ReadRGBAPixels = read_rgba_pixels_BGRA; } else if (osmesa->format == OSMESA_ARGB) { swdd->WriteRGBASpan = write_rgba_span_ARGB; swdd->WriteRGBSpan = write_rgb_span_ARGB; swdd->WriteMonoRGBASpan = write_monorgba_span_ARGB; swdd->WriteRGBAPixels = write_rgba_pixels_ARGB; swdd->WriteMonoRGBAPixels = write_monorgba_pixels_ARGB; swdd->ReadRGBASpan = read_rgba_span_ARGB; swdd->ReadRGBAPixels = read_rgba_pixels_ARGB; } else if (osmesa->format == OSMESA_COLOR_INDEX) { swdd->WriteCI32Span = write_index32_span_CI; swdd->WriteCI8Span = write_index8_span_CI; swdd->WriteMonoCISpan = write_monoindex_span_CI; swdd->WriteCI32Pixels = write_index_pixels_CI; swdd->WriteMonoCIPixels = write_monoindex_pixels_CI; swdd->ReadCI32Span = read_index_span_CI; swdd->ReadCI32Pixels = read_index_pixels_CI; } else { _mesa_problem(ctx, "bad pixel format in osmesa_update_state!\n"); } /* Extend the software rasterizer with our optimized line and triangle * drawin functions. */ swrast->choose_line = osmesa_choose_line; swrast->choose_triangle = osmesa_choose_triangle; swrast->invalidate_line |= OSMESA_NEW_LINE; swrast->invalidate_triangle |= OSMESA_NEW_TRIANGLE; } /**********************************************************************/ /***** Public Functions *****/ /**********************************************************************/ /* * Create an Off-Screen Mesa rendering context. The only attribute needed is * an RGBA vs Color-Index mode flag. * * Input: format - either GL_RGBA or GL_COLOR_INDEX * sharelist - specifies another OSMesaContext with which to share * display lists. NULL indicates no sharing. * Return: an OSMesaContext or 0 if error */ GLAPI OSMesaContext GLAPIENTRY OSMesaCreateContext( GLenum format, OSMesaContext sharelist ) { const GLint accumBits = (format == OSMESA_COLOR_INDEX) ? 0 : 16; return OSMesaCreateContextExt(format, DEFAULT_SOFTWARE_DEPTH_BITS, 8, accumBits, sharelist); } /* * New in Mesa 3.5 * * Create context and specify size of ancillary buffers. */ GLAPI OSMesaContext GLAPIENTRY OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits, GLint accumBits, OSMesaContext sharelist ) { OSMesaContext osmesa; struct dd_function_table functions; GLint rshift, gshift, bshift, ashift; GLint rind, gind, bind, aind; GLint indexBits = 0, redBits = 0, greenBits = 0, blueBits = 0, alphaBits =0; GLboolean rgbmode; const GLuint i4 = 1; const GLubyte *i1 = (GLubyte *) &i4; const GLint little_endian = *i1; rind = gind = bind = aind = 0; if (format==OSMESA_COLOR_INDEX) { indexBits = 8; rshift = gshift = bshift = ashift = 0; rgbmode = GL_FALSE; } else if (format==OSMESA_RGBA) { indexBits = 0; redBits = CHAN_BITS; greenBits = CHAN_BITS; blueBits = CHAN_BITS; alphaBits = CHAN_BITS; rind = 0; gind = 1; bind = 2; aind = 3; if (little_endian) { rshift = 0; gshift = 8; bshift = 16; ashift = 24; } else { rshift = 24; gshift = 16; bshift = 8; ashift = 0; } rgbmode = GL_TRUE; } else if (format==OSMESA_BGRA) { indexBits = 0; redBits = CHAN_BITS; greenBits = CHAN_BITS; blueBits = CHAN_BITS; alphaBits = CHAN_BITS; bind = 0; gind = 1; rind = 2; aind = 3; if (little_endian) { bshift = 0; gshift = 8; rshift = 16; ashift = 24; } else { bshift = 24; gshift = 16; rshift = 8; ashift = 0; } rgbmode = GL_TRUE; } else if (format==OSMESA_ARGB) { indexBits = 0; redBits = CHAN_BITS; greenBits = CHAN_BITS; blueBits = CHAN_BITS; alphaBits = CHAN_BITS; aind = 0; rind = 1; gind = 2; bind = 3; if (little_endian) { ashift = 0; rshift = 8; gshift = 16; bshift = 24; } else { ashift = 24; rshift = 16; gshift = 8; bshift = 0; } rgbmode = GL_TRUE; } else if (format==OSMESA_RGB) { indexBits = 0; redBits = CHAN_BITS; greenBits = CHAN_BITS; blueBits = CHAN_BITS; alphaBits = 0; bshift = 0; gshift = 8; rshift = 16; ashift = 24; rind = 0; gind = 1; bind = 2; rgbmode = GL_TRUE; } else if (format==OSMESA_BGR) { indexBits = 0; redBits = CHAN_BITS; greenBits = CHAN_BITS; blueBits = CHAN_BITS; alphaBits = 0; bshift = 0; gshift = 8; rshift = 16; ashift = 24; rind = 2; gind = 1; bind = 0; rgbmode = GL_TRUE; } #if CHAN_TYPE == GL_UNSIGNED_BYTE else if (format==OSMESA_RGB_565) { indexBits = 0; redBits = 5; greenBits = 6; blueBits = 5; alphaBits = 0; rshift = 11; gshift = 5; bshift = 0; ashift = 0; rind = 0; /* not used */ gind = 0; bind = 0; rgbmode = GL_TRUE; } #endif else { return NULL; } osmesa = (OSMesaContext) CALLOC_STRUCT(osmesa_context); if (osmesa) { osmesa->gl_visual = _mesa_create_visual( rgbmode, GL_FALSE, /* double buffer */ GL_FALSE, /* stereo */ redBits, greenBits, blueBits, alphaBits, indexBits, depthBits, stencilBits, accumBits, accumBits, accumBits, alphaBits ? accumBits : 0, 1 /* num samples */ ); if (!osmesa->gl_visual) { FREE(osmesa); return NULL; } /* Initialize device driver function table */ _mesa_init_driver_functions(&functions); /* override with our functions */ functions.GetString = get_string; functions.UpdateState = osmesa_update_state; functions.GetBufferSize = get_buffer_size; functions.Clear = clear; if (!_mesa_initialize_context(&osmesa->mesa, osmesa->gl_visual, sharelist ? &sharelist->mesa : (GLcontext *) NULL, &functions, (void *) osmesa)) { _mesa_destroy_visual( osmesa->gl_visual ); FREE(osmesa); return NULL; } _mesa_enable_sw_extensions(&(osmesa->mesa)); _mesa_enable_1_3_extensions(&(osmesa->mesa)); _mesa_enable_1_4_extensions(&(osmesa->mesa)); _mesa_enable_1_5_extensions(&(osmesa->mesa)); osmesa->gl_buffer = _mesa_create_framebuffer( osmesa->gl_visual, (GLboolean) ( osmesa->gl_visual->depthBits > 0 ), (GLboolean) ( osmesa->gl_visual->stencilBits > 0 ), (GLboolean) ( osmesa->gl_visual->accumRedBits > 0 ), GL_FALSE /* s/w alpha */ ); if (!osmesa->gl_buffer) { _mesa_destroy_visual( osmesa->gl_visual ); _mesa_free_context_data( &osmesa->mesa ); FREE(osmesa); return NULL; } osmesa->format = format; osmesa->buffer = NULL; osmesa->width = 0; osmesa->height = 0; osmesa->userRowLength = 0; osmesa->rowlength = 0; osmesa->yup = GL_TRUE; osmesa->rshift = rshift; osmesa->gshift = gshift; osmesa->bshift = bshift; osmesa->ashift = ashift; osmesa->rInd = rind; osmesa->gInd = gind; osmesa->bInd = bind; osmesa->aInd = aind; /* Initialize the software rasterizer and helper modules. */ { GLcontext *ctx = &osmesa->mesa; if (!_swrast_CreateContext( ctx ) || !_ac_CreateContext( ctx ) || !_tnl_CreateContext( ctx ) || !_swsetup_CreateContext( ctx )) { _mesa_destroy_visual(osmesa->gl_visual); _mesa_free_context_data(ctx); _mesa_free(osmesa); return NULL; } _swsetup_Wakeup( ctx ); hook_in_driver_functions( ctx ); } } return osmesa; } /* * Destroy an Off-Screen Mesa rendering context. * * Input: ctx - the context to destroy */ GLAPI void GLAPIENTRY OSMesaDestroyContext( OSMesaContext ctx ) { if (ctx) { _swsetup_DestroyContext( &ctx->mesa ); _tnl_DestroyContext( &ctx->mesa ); _ac_DestroyContext( &ctx->mesa ); _swrast_DestroyContext( &ctx->mesa ); _mesa_destroy_visual( ctx->gl_visual ); _mesa_destroy_framebuffer( ctx->gl_buffer ); _mesa_free_context_data( &ctx->mesa ); FREE( ctx ); } } /* * Recompute the values of the context's rowaddr array. */ static void compute_row_addresses( OSMesaContext ctx ) { GLint bytesPerPixel, bytesPerRow, i; GLubyte *origin = (GLubyte *) ctx->buffer; if (ctx->format == OSMESA_COLOR_INDEX) { /* CI mode */ bytesPerPixel = 1 * sizeof(GLchan); } else if ((ctx->format == OSMESA_RGB) || (ctx->format == OSMESA_BGR)) { /* RGB mode */ bytesPerPixel = 3 * sizeof(GLchan); } else if (ctx->format == OSMESA_RGB_565) { /* 5/6/5 RGB pixel in 16 bits */ bytesPerPixel = 2; } else { /* RGBA mode */ bytesPerPixel = 4 * sizeof(GLchan); } bytesPerRow = ctx->rowlength * bytesPerPixel; if (ctx->yup) { /* Y=0 is bottom line of window */ for (i = 0; i < MAX_HEIGHT; i++) { ctx->rowaddr[i] = (GLchan *) ((GLubyte *) origin + i * bytesPerRow); } } else { /* Y=0 is top line of window */ for (i = 0; i < MAX_HEIGHT; i++) { GLint j = ctx->height - i - 1; ctx->rowaddr[i] = (GLchan *) ((GLubyte *) origin + j * bytesPerRow); } } } /* * Bind an OSMesaContext to an image buffer. The image buffer is just a * block of memory which the client provides. Its size must be at least * as large as width*height*sizeof(type). Its address should be a multiple * of 4 if using RGBA mode. * * Image data is stored in the order of glDrawPixels: row-major order * with the lower-left image pixel stored in the first array position * (ie. bottom-to-top). * * If the context's viewport hasn't been initialized yet, it will now be * initialized to (0,0,width,height). * * Input: ctx - the rendering context * buffer - the image buffer memory * type - data type for pixel components * Normally, only GL_UNSIGNED_BYTE and GL_UNSIGNED_SHORT_5_6_5 * are supported. But if Mesa's been compiled with CHAN_BITS==16 * then type must be GL_UNSIGNED_SHORT. And if Mesa's been build * with CHAN_BITS==32 then type must be GL_FLOAT. * width, height - size of image buffer in pixels, at least 1 * Return: GL_TRUE if success, GL_FALSE if error because of invalid ctx, * invalid buffer address, invalid type, width<1, height<1, * width>internal limit or height>internal limit. */ GLAPI GLboolean GLAPIENTRY OSMesaMakeCurrent( OSMesaContext ctx, void *buffer, GLenum type, GLsizei width, GLsizei height ) { if (!ctx || !buffer || width < 1 || height < 1 || width > MAX_WIDTH || height > MAX_HEIGHT) { return GL_FALSE; } if (ctx->format == OSMESA_RGB_565) { if (type != GL_UNSIGNED_SHORT_5_6_5) return GL_FALSE; } else if (type != CHAN_TYPE) { return GL_FALSE; } /* Need to set these before calling _mesa_make_current() since the first * time the context is bound, _mesa_make_current() will call our * get_buffer_size() function to initialize the viewport. These are the * values returned by get_buffer_size(): */ ctx->buffer = buffer; ctx->width = width; ctx->height = height; osmesa_update_state( &ctx->mesa, 0 ); _mesa_make_current( &ctx->mesa, ctx->gl_buffer ); if (ctx->userRowLength) ctx->rowlength = ctx->userRowLength; else ctx->rowlength = width; compute_row_addresses( ctx ); /* this will make ensure we recognize the new buffer size */ _mesa_ResizeBuffersMESA(); /* Added by Gerk Huisma: */ _tnl_MakeCurrent( &ctx->mesa, ctx->mesa.DrawBuffer, ctx->mesa.ReadBuffer ); return GL_TRUE; } GLAPI OSMesaContext GLAPIENTRY OSMesaGetCurrentContext( void ) { GLcontext *ctx = _mesa_get_current_context(); if (ctx) return (OSMesaContext) ctx; else return NULL; } GLAPI void GLAPIENTRY OSMesaPixelStore( GLint pname, GLint value ) { OSMesaContext osmesa = OSMesaGetCurrentContext(); switch (pname) { case OSMESA_ROW_LENGTH: if (value<0) { _mesa_error( &osmesa->mesa, GL_INVALID_VALUE, "OSMesaPixelStore(value)" ); return; } osmesa->userRowLength = value; osmesa->rowlength = value ? value : osmesa->width; break; case OSMESA_Y_UP: osmesa->yup = value ? GL_TRUE : GL_FALSE; break; default: _mesa_error( &osmesa->mesa, GL_INVALID_ENUM, "OSMesaPixelStore(pname)" ); return; } compute_row_addresses( osmesa ); } GLAPI void GLAPIENTRY OSMesaGetIntegerv( GLint pname, GLint *value ) { OSMesaContext osmesa = OSMesaGetCurrentContext(); switch (pname) { case OSMESA_WIDTH: *value = osmesa->width; return; case OSMESA_HEIGHT: *value = osmesa->height; return; case OSMESA_FORMAT: *value = osmesa->format; return; case OSMESA_TYPE: *value = CHAN_TYPE; return; case OSMESA_ROW_LENGTH: *value = osmesa->userRowLength; return; case OSMESA_Y_UP: *value = osmesa->yup; return; case OSMESA_MAX_WIDTH: *value = MAX_WIDTH; return; case OSMESA_MAX_HEIGHT: *value = MAX_HEIGHT; return; default: _mesa_error(&osmesa->mesa, GL_INVALID_ENUM, "OSMesaGetIntergerv(pname)"); return; } } /* * Return the depth buffer associated with an OSMesa context. * Input: c - the OSMesa context * Output: width, height - size of buffer in pixels * bytesPerValue - bytes per depth value (2 or 4) * buffer - pointer to depth buffer values * Return: GL_TRUE or GL_FALSE to indicate success or failure. */ GLAPI GLboolean GLAPIENTRY OSMesaGetDepthBuffer( OSMesaContext c, GLint *width, GLint *height, GLint *bytesPerValue, void **buffer ) { if ((!c->gl_buffer) || (!c->gl_buffer->DepthBuffer)) { *width = 0; *height = 0; *bytesPerValue = 0; *buffer = 0; return GL_FALSE; } else { *width = c->gl_buffer->Width; *height = c->gl_buffer->Height; if (c->gl_visual->depthBits <= 16) *bytesPerValue = sizeof(GLushort); else *bytesPerValue = sizeof(GLuint); *buffer = c->gl_buffer->DepthBuffer; return GL_TRUE; } } /* * Return the color buffer associated with an OSMesa context. * Input: c - the OSMesa context * Output: width, height - size of buffer in pixels * format - the pixel format (OSMESA_FORMAT) * buffer - pointer to color buffer values * Return: GL_TRUE or GL_FALSE to indicate success or failure. */ GLAPI GLboolean GLAPIENTRY OSMesaGetColorBuffer( OSMesaContext c, GLint *width, GLint *height, GLint *format, void **buffer ) { if (!c->buffer) { *width = 0; *height = 0; *format = 0; *buffer = 0; return GL_FALSE; } else { *width = c->width; *height = c->height; *format = c->format; *buffer = c->buffer; return GL_TRUE; } } struct name_function { const char *Name; OSMESAproc Function; }; static struct name_function functions[] = { { "OSMesaCreateContext", (OSMESAproc) OSMesaCreateContext }, { "OSMesaCreateContextExt", (OSMESAproc) OSMesaCreateContextExt }, { "OSMesaDestroyContext", (OSMESAproc) OSMesaDestroyContext }, { "OSMesaMakeCurrent", (OSMESAproc) OSMesaMakeCurrent }, { "OSMesaGetCurrentContext", (OSMESAproc) OSMesaGetCurrentContext }, { "OSMesaPixelsStore", (OSMESAproc) OSMesaPixelStore }, { "OSMesaGetIntegerv", (OSMESAproc) OSMesaGetIntegerv }, { "OSMesaGetDepthBuffer", (OSMESAproc) OSMesaGetDepthBuffer }, { "OSMesaGetColorBuffer", (OSMESAproc) OSMesaGetColorBuffer }, { "OSMesaGetProcAddress", (OSMESAproc) OSMesaGetProcAddress }, { NULL, NULL } }; GLAPI OSMESAproc GLAPIENTRY OSMesaGetProcAddress( const char *funcName ) { int i; for (i = 0; functions[i].Name; i++) { if (_mesa_strcmp(functions[i].Name, funcName) == 0) return functions[i].Function; } return _glapi_get_proc_address(funcName); }