diff options
author | Brian Paul <brian.paul@tungstengraphics.com> | 2003-12-06 17:20:10 +0000 |
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committer | Brian Paul <brian.paul@tungstengraphics.com> | 2003-12-06 17:20:10 +0000 |
commit | a763123b35ac4f7bd1b3a47b5b3180f217a3b81d (patch) | |
tree | e8338cbbb386bf7a92cd5ae3d6f90a5e0578a3d7 /src/mesa/drivers/fbdev | |
parent | fde2b9750ea9f37b018aaa26c9bbb6454cd1c016 (diff) |
glFBDev driver from embedded-2 branch.
Probably won't be actively used/maintained, but bring it to the trunk so
it doesn't get lost.
Diffstat (limited to 'src/mesa/drivers/fbdev')
-rw-r--r-- | src/mesa/drivers/fbdev/glfbdev.c | 828 |
1 files changed, 828 insertions, 0 deletions
diff --git a/src/mesa/drivers/fbdev/glfbdev.c b/src/mesa/drivers/fbdev/glfbdev.c new file mode 100644 index 0000000000..6d3ed01d7b --- /dev/null +++ b/src/mesa/drivers/fbdev/glfbdev.c @@ -0,0 +1,828 @@ +/* + * Mesa 3-D graphics library + * Version: 5.1 + * + * Copyright (C) 1999-2003 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. + */ + + +/* + * OpenGL (Mesa) interface for fbdev. + * For info about fbdev: + * http://www.tldp.org/HOWTO/Framebuffer-HOWTO.html + * + * known VGA modes + * Colours 640x400 640x480 800x600 1024x768 1152x864 1280x1024 1600x1200 + * --------+-------------------------------------------------------------- + * 4 bits | ? ? 0x302 ? ? ? ? + * 8 bits | 0x300 0x301 0x303 0x305 0x161 0x307 0x31C + * 15 bits | ? 0x310 0x313 0x316 0x162 0x319 0x31D + * 16 bits | ? 0x311 0x314 0x317 0x163 0x31A 0x31E + * 24 bits | ? 0x312 0x315 0x318 ? 0x31B 0x31F + * 32 bits | ? ? ? ? 0x164 ? + */ + + +#ifdef USE_GLFBDEV_DRIVER + +#include "glheader.h" +#include <linux/fb.h> +#include "GL/glfbdev.h" +#include "context.h" +#include "extensions.h" +#include "imports.h" +#include "texformat.h" +#include "teximage.h" +#include "texstore.h" +#include "array_cache/acache.h" +#include "swrast/swrast.h" +#include "swrast_setup/swrast_setup.h" +#include "tnl/tnl.h" +#include "tnl/t_context.h" +#include "tnl/t_pipeline.h" + + +#define PF_B8G8R8 1 +#define PF_B8G8R8A8 2 +#define PF_B5G6R5 3 +#define PF_B5G5R5 4 +#define PF_CI8 5 + + +/* + * Derived from Mesa's GLvisual class. + */ +struct GLFBDevVisualRec { + GLvisual glvisual; /* base class */ + struct fb_fix_screeninfo fix; + struct fb_var_screeninfo var; + int pixelFormat; +}; + +/* + * Derived from Mesa's GLframebuffer class. + */ +struct GLFBDevBufferRec { + GLframebuffer glframebuffer; /* base class */ + GLFBDevVisualPtr visual; + struct fb_fix_screeninfo fix; + struct fb_var_screeninfo var; + void *frontStart; + void *backStart; + size_t size; + GLuint bytesPerPixel; + GLuint rowStride; /* in bytes */ + GLubyte *frontBottom; /* pointer to last row */ + GLubyte *backBottom; /* pointer to last row */ + GLubyte *curBottom; /* = frontBottom or backBottom */ + GLboolean mallocBackBuffer; +}; + +/* + * Derived from Mesa's GLcontext class. + */ +struct GLFBDevContextRec { + GLcontext glcontext; /* base class */ + GLFBDevVisualPtr visual; + GLFBDevBufferPtr drawBuffer; + GLFBDevBufferPtr readBuffer; + GLFBDevBufferPtr curBuffer; +}; + + + +#define GLFBDEV_CONTEXT(CTX) ((GLFBDevContextPtr) (CTX)) +#define GLFBDEV_BUFFER(BUF) ((GLFBDevBufferPtr) (BUF)) + + +/**********************************************************************/ +/* Internal device driver functions */ +/**********************************************************************/ + + +static const GLubyte * +get_string(GLcontext *ctx, GLenum pname) +{ + (void) ctx; + switch (pname) { + case GL_RENDERER: + return (const GLubyte *) "Mesa glfbdev"; + default: + return NULL; + } +} + + +static void +update_state( GLcontext *ctx, GLuint new_state ) +{ + /* not much to do here - pass it on */ + _swrast_InvalidateState( ctx, new_state ); + _swsetup_InvalidateState( ctx, new_state ); + _ac_InvalidateState( ctx, new_state ); + _tnl_InvalidateState( ctx, new_state ); +} + + +static void +get_buffer_size( GLframebuffer *buffer, GLuint *width, GLuint *height ) +{ + const GLFBDevBufferPtr fbdevbuffer = (GLFBDevBufferPtr) buffer; + *width = fbdevbuffer->var.xres_virtual; + *height = fbdevbuffer->var.yres_virtual; +} + + +/* specifies the buffer for swrast span rendering/reading */ +static void +set_buffer( GLcontext *ctx, GLframebuffer *buffer, GLuint bufferBit ) +{ + GLFBDevContextPtr fbdevctx = GLFBDEV_CONTEXT(ctx); + GLFBDevBufferPtr fbdevbuf = GLFBDEV_BUFFER(buffer); + fbdevctx->curBuffer = fbdevbuf; + switch (bufferBit) { + case FRONT_LEFT_BIT: + fbdevbuf->curBottom = fbdevbuf->frontBottom; + break; + case BACK_LEFT_BIT: + fbdevbuf->curBottom = fbdevbuf->backBottom; + break; + default: + _mesa_problem(ctx, "bad bufferBit in set_buffer()"); + } +} + + +static void +init_core_functions( GLcontext *ctx ) +{ + ctx->Driver.GetString = get_string; + ctx->Driver.UpdateState = update_state; + ctx->Driver.ResizeBuffers = _swrast_alloc_buffers; + ctx->Driver.GetBufferSize = get_buffer_size; + + ctx->Driver.Accum = _swrast_Accum; + ctx->Driver.Bitmap = _swrast_Bitmap; + ctx->Driver.Clear = _swrast_Clear; /* would be good to optimize */ + ctx->Driver.CopyPixels = _swrast_CopyPixels; + ctx->Driver.DrawPixels = _swrast_DrawPixels; + ctx->Driver.ReadPixels = _swrast_ReadPixels; + ctx->Driver.DrawBuffer = _swrast_DrawBuffer; + + ctx->Driver.ChooseTextureFormat = _mesa_choose_tex_format; + ctx->Driver.TexImage1D = _mesa_store_teximage1d; + ctx->Driver.TexImage2D = _mesa_store_teximage2d; + ctx->Driver.TexImage3D = _mesa_store_teximage3d; + ctx->Driver.TexSubImage1D = _mesa_store_texsubimage1d; + ctx->Driver.TexSubImage2D = _mesa_store_texsubimage2d; + ctx->Driver.TexSubImage3D = _mesa_store_texsubimage3d; + ctx->Driver.TestProxyTexImage = _mesa_test_proxy_teximage; + + ctx->Driver.CompressedTexImage1D = _mesa_store_compressed_teximage1d; + ctx->Driver.CompressedTexImage2D = _mesa_store_compressed_teximage2d; + ctx->Driver.CompressedTexImage3D = _mesa_store_compressed_teximage3d; + ctx->Driver.CompressedTexSubImage1D = _mesa_store_compressed_texsubimage1d; + ctx->Driver.CompressedTexSubImage2D = _mesa_store_compressed_texsubimage2d; + ctx->Driver.CompressedTexSubImage3D = _mesa_store_compressed_texsubimage3d; + + ctx->Driver.CopyTexImage1D = _swrast_copy_teximage1d; + ctx->Driver.CopyTexImage2D = _swrast_copy_teximage2d; + ctx->Driver.CopyTexSubImage1D = _swrast_copy_texsubimage1d; + ctx->Driver.CopyTexSubImage2D = _swrast_copy_texsubimage2d; + ctx->Driver.CopyTexSubImage3D = _swrast_copy_texsubimage3d; + ctx->Driver.CopyColorTable = _swrast_CopyColorTable; + ctx->Driver.CopyColorSubTable = _swrast_CopyColorSubTable; + ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D; + ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D; +} + + +/* + * Generate code for span functions. + */ + +/* 24-bit BGR */ +#define NAME(PREFIX) PREFIX##_B8G8R8 +#define SPAN_VARS \ + const GLFBDevContextPtr fbdevctx = GLFBDEV_CONTEXT(ctx); \ + const GLFBDevBufferPtr fbdevbuf = fbdevctx->curBuffer; +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = fbdevbuf->curBottom - (Y) * fbdevbuf->rowStride + (X) * 3 +#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) \ + R = P[2]; G = P[1]; B = P[0]; A = CHAN_MAX + +#include "swrast/s_spantemp.h" + + +/* 32-bit BGRA */ +#define NAME(PREFIX) PREFIX##_B8G8R8A8 +#define SPAN_VARS \ + const GLFBDevContextPtr fbdevctx = GLFBDEV_CONTEXT(ctx); \ + const GLFBDevBufferPtr fbdevbuf = fbdevctx->curBuffer; +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = fbdevbuf->curBottom - (Y) * fbdevbuf->rowStride + (X) * 4 +#define INC_PIXEL_PTR(P) P += 4 +#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ + P[0] = B; P[1] = G; P[2] = R; P[3] = 255 +#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ + P[0] = B; P[1] = G; P[2] = R; 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" + + +/* 16-bit BGR (XXX implement dithering someday) */ +#define NAME(PREFIX) PREFIX##_B5G6R5 +#define SPAN_VARS \ + const GLFBDevContextPtr fbdevctx = GLFBDEV_CONTEXT(ctx); \ + const GLFBDevBufferPtr fbdevbuf = fbdevctx->curBuffer; +#define INIT_PIXEL_PTR(P, X, Y) \ + GLushort *P = (GLushort *) (fbdevbuf->curBottom - (Y) * fbdevbuf->rowStride + (X) * 2) +#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" + + +/* 15-bit BGR (XXX implement dithering someday) */ +#define NAME(PREFIX) PREFIX##_B5G5R5 +#define SPAN_VARS \ + const GLFBDevContextPtr fbdevctx = GLFBDEV_CONTEXT(ctx); \ + const GLFBDevBufferPtr fbdevbuf = fbdevctx->curBuffer; +#define INIT_PIXEL_PTR(P, X, Y) \ + GLushort *P = (GLushort *) (fbdevbuf->curBottom - (Y) * fbdevbuf->rowStride + (X) * 2) +#define INC_PIXEL_PTR(P) P += 1 +#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \ + *P = ( (((R) & 0xf8) << 7) | (((G) & 0xf8) << 2) | ((B) >> 3) ) +#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \ + *P = ( (((R) & 0xf8) << 7) | (((G) & 0xf8) << 2) | ((B) >> 3) ) +#define FETCH_RGBA_PIXEL(R, G, B, A, P) \ + R = ( (((*P) >> 7) & 0xf8) | (((*P) >> 10) & 0x7) ); \ + G = ( (((*P) >> 2) & 0xf8) | (((*P) >> 5) & 0x7) ); \ + B = ( (((*P) << 3) & 0xf8) | (((*P) ) & 0x7) ); \ + A = CHAN_MAX + +#include "swrast/s_spantemp.h" + + +/* 8-bit color index */ +#define NAME(PREFIX) PREFIX##_CI8 +#define SPAN_VARS \ + const GLFBDevContextPtr fbdevctx = GLFBDEV_CONTEXT(ctx); \ + const GLFBDevBufferPtr fbdevbuf = fbdevctx->curBuffer; +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = fbdevbuf->curBottom - (Y) * fbdevbuf->rowStride + (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" + +/**********************************************************************/ +/* Public API functions */ +/**********************************************************************/ + + +const char * +glFBDevGetString( int str ) +{ + switch (str) { + case GLFBDEV_VENDOR: + return "Mesa Project"; + case GLFBDEV_VERSION: + return "1.0.0"; + default: + return NULL; + } +} + + +const void * +glFBDevGetProcAddress( const char *procName ) +{ + struct name_address { + const char *name; + const void *func; + }; + static const struct name_address functions[] = { + { "glFBDevGetString", (void *) glFBDevGetString }, + { "glFBDevGetProcAddress", (void *) glFBDevGetProcAddress }, + { "glFBDevCreateVisual", (void *) glFBDevCreateVisual }, + { "glFBDevDestroyVisual", (void *) glFBDevDestroyVisual }, + { "glFBDevGetVisualAttrib", (void *) glFBDevGetVisualAttrib }, + { "glFBDevCreateBuffer", (void *) glFBDevCreateBuffer }, + { "glFBDevDestroyBuffer", (void *) glFBDevDestroyBuffer }, + { "glFBDevGetBufferAttrib", (void *) glFBDevGetBufferAttrib }, + { "glFBDevGetCurrentDrawBuffer", (void *) glFBDevGetCurrentDrawBuffer }, + { "glFBDevGetCurrentReadBuffer", (void *) glFBDevGetCurrentReadBuffer }, + { "glFBDevSwapBuffers", (void *) glFBDevSwapBuffers }, + { "glFBDevCreateContext", (void *) glFBDevCreateContext }, + { "glFBDevDestroyContext", (void *) glFBDevDestroyContext }, + { "glFBDevGetContextAttrib", (void *) glFBDevGetContextAttrib }, + { "glFBDevGetCurrentContext", (void *) glFBDevGetCurrentContext }, + { "glFBDevMakeCurrent", (void *) glFBDevMakeCurrent }, + { NULL, NULL } + }; + const struct name_address *entry; + for (entry = functions; entry->name; entry++) { + if (_mesa_strcmp(entry->name, procName) == 0) { + return entry->func; + } + } + return _glapi_get_proc_address(procName); +} + + +GLFBDevVisualPtr +glFBDevCreateVisual( const struct fb_fix_screeninfo *fixInfo, + const struct fb_var_screeninfo *varInfo, + const int *attribs ) +{ + GLFBDevVisualPtr vis; + const int *attrib; + GLboolean rgbFlag = GL_TRUE, dbFlag = GL_FALSE, stereoFlag = GL_FALSE; + GLint redBits = 0, greenBits = 0, blueBits = 0, alphaBits = 0; + GLint indexBits = 0, depthBits = 0, stencilBits = 0; + GLint accumRedBits = 0, accumGreenBits = 0; + GLint accumBlueBits = 0, accumAlphaBits = 0; + GLint numSamples = 0; + + ASSERT(fixInfo); + ASSERT(varInfo); + + vis = CALLOC_STRUCT(GLFBDevVisualRec); + if (!vis) + return NULL; + + vis->fix = *fixInfo; /* struct assignment */ + vis->var = *varInfo; /* struct assignment */ + + for (attrib = attribs; attrib && *attrib != GLFBDEV_NONE; attrib++) { + switch (*attrib) { + case GLFBDEV_DOUBLE_BUFFER: + dbFlag = GL_TRUE; + break; + case GLFBDEV_COLOR_INDEX: + rgbFlag = GL_FALSE; + break; + case GLFBDEV_DEPTH_SIZE: + depthBits = attrib[1]; + attrib++; + break; + case GLFBDEV_STENCIL_SIZE: + stencilBits = attrib[1]; + attrib++; + break; + case GLFBDEV_ACCUM_SIZE: + accumRedBits = accumGreenBits = accumBlueBits = accumAlphaBits + = attrib[1]; + attrib++; + break; + case GLFBDEV_LEVEL: + /* ignored for now */ + break; + default: + /* unexpected token */ + _mesa_free(vis); + return NULL; + } + } + + if (rgbFlag) { + redBits = varInfo->red.length; + greenBits = varInfo->green.length; + blueBits = varInfo->blue.length; + alphaBits = varInfo->transp.length; + + if ((fixInfo->visual == FB_VISUAL_TRUECOLOR || + fixInfo->visual == FB_VISUAL_DIRECTCOLOR) + && varInfo->bits_per_pixel == 24 + && varInfo->red.offset == 16 + && varInfo->green.offset == 8 + && varInfo->blue.offset == 0) { + vis->pixelFormat = PF_B8G8R8; + } + else if ((fixInfo->visual == FB_VISUAL_TRUECOLOR || + fixInfo->visual == FB_VISUAL_DIRECTCOLOR) + && varInfo->bits_per_pixel == 32 + && varInfo->red.offset == 16 + && varInfo->green.offset == 8 + && varInfo->blue.offset == 0 + && varInfo->transp.offset == 24) { + vis->pixelFormat = PF_B8G8R8A8; + } + else if ((fixInfo->visual == FB_VISUAL_TRUECOLOR || + fixInfo->visual == FB_VISUAL_DIRECTCOLOR) + && varInfo->bits_per_pixel == 16 + && varInfo->red.offset == 11 + && varInfo->green.offset == 5 + && varInfo->blue.offset == 0) { + vis->pixelFormat = PF_B5G6R5; + } + else if ((fixInfo->visual == FB_VISUAL_TRUECOLOR || + fixInfo->visual == FB_VISUAL_DIRECTCOLOR) + && varInfo->bits_per_pixel == 16 + && varInfo->red.offset == 10 + && varInfo->green.offset == 5 + && varInfo->blue.offset == 0) { + vis->pixelFormat = PF_B5G5R5; + } + else { + _mesa_problem(NULL, "Unsupported fbdev RGB visual/bitdepth!\n"); + /* + printf("fixInfo->visual = 0x%x\n", fixInfo->visual); + printf("varInfo->bits_per_pixel = %d\n", varInfo->bits_per_pixel); + printf("varInfo->red.offset = %d\n", varInfo->red.offset); + printf("varInfo->green.offset = %d\n", varInfo->green.offset); + printf("varInfo->blue.offset = %d\n", varInfo->blue.offset); + */ + _mesa_free(vis); + return NULL; + } + } + else { + indexBits = varInfo->bits_per_pixel; + if ((fixInfo->visual == FB_VISUAL_PSEUDOCOLOR || + fixInfo->visual == FB_VISUAL_STATIC_PSEUDOCOLOR) + && varInfo->bits_per_pixel == 8) { + vis->pixelFormat = PF_CI8; + } + else { + _mesa_problem(NULL, "Unsupported fbdev CI visual/bitdepth!\n"); + _mesa_free(vis); + return NULL; + } + } + + if (!_mesa_initialize_visual(&vis->glvisual, rgbFlag, dbFlag, stereoFlag, + redBits, greenBits, blueBits, alphaBits, + indexBits, depthBits, stencilBits, + accumRedBits, accumGreenBits, + accumBlueBits, accumAlphaBits, + numSamples)) { + /* something was invalid */ + _mesa_free(vis); + return NULL; + } + + return vis; +} + + +void +glFBDevDestroyVisual( GLFBDevVisualPtr visual ) +{ + if (visual) + _mesa_free(visual); +} + + +int +glFBDevGetVisualAttrib( const GLFBDevVisualPtr visual, int attrib) +{ + (void) visual; + (void) attrib; + return -1; +} + + + +GLFBDevBufferPtr +glFBDevCreateBuffer( const struct fb_fix_screeninfo *fixInfo, + const struct fb_var_screeninfo *varInfo, + const GLFBDevVisualPtr visual, + void *frontBuffer, void *backBuffer, size_t size ) +{ + GLFBDevBufferPtr buf; + + ASSERT(visual); + ASSERT(frontBuffer); + ASSERT(size > 0); + + if (visual->fix.visual != fixInfo->visual || + visual->fix.type != fixInfo->type || + visual->var.bits_per_pixel != varInfo->bits_per_pixel || + visual->var.grayscale != varInfo->grayscale || + visual->var.red.offset != varInfo->red.offset || + visual->var.green.offset != varInfo->green.offset || + visual->var.blue.offset != varInfo->blue.offset || + visual->var.transp.offset != varInfo->transp.offset) { + /* visual mismatch! */ + return NULL; + } + + buf = CALLOC_STRUCT(GLFBDevBufferRec); + if (!buf) + return NULL; + + _mesa_initialize_framebuffer(&buf->glframebuffer, &visual->glvisual, + visual->glvisual.haveDepthBuffer, + visual->glvisual.haveStencilBuffer, + visual->glvisual.haveAccumBuffer, + GL_FALSE); + + buf->fix = *fixInfo; /* struct assignment */ + buf->var = *varInfo; /* struct assignment */ + buf->visual = visual; /* ptr assignment */ + buf->frontStart = frontBuffer; + buf->size = size; + buf->bytesPerPixel = visual->var.bits_per_pixel / 8; + buf->rowStride = visual->var.xres_virtual * buf->bytesPerPixel; + buf->frontBottom = (GLubyte *) buf->frontStart + + (visual->var.yres_virtual - 1) * buf->rowStride; + + if (visual->glvisual.doubleBufferMode) { + if (backBuffer) { + buf->backStart = backBuffer; + buf->mallocBackBuffer = GL_FALSE; + } + else { + buf->backStart = _mesa_malloc(size); + if (!buf->backStart) { + _mesa_free_framebuffer_data(&buf->glframebuffer); + _mesa_free(buf); + return NULL; + } + buf->mallocBackBuffer = GL_TRUE; + } + buf->backBottom = (GLubyte *) buf->backStart + + (visual->var.yres_virtual - 1) * buf->rowStride; + buf->curBottom = buf->backBottom; + } + else { + buf->backStart = NULL; + buf->mallocBackBuffer = GL_FALSE; + buf->backBottom = NULL; + buf->curBottom = buf->frontBottom; + } + + return buf; +} + + +void +glFBDevDestroyBuffer( GLFBDevBufferPtr buffer ) +{ + if (buffer) { + /* check if destroying the current buffer */ + GLFBDevBufferPtr curDraw = glFBDevGetCurrentDrawBuffer(); + GLFBDevBufferPtr curRead = glFBDevGetCurrentReadBuffer(); + if (buffer == curDraw || buffer == curRead) { + glFBDevMakeCurrent( NULL, NULL, NULL); + } + if (buffer->mallocBackBuffer) { + _mesa_free(buffer->backStart); + } + /* free the software depth, stencil, accum buffers */ + _mesa_free_framebuffer_data(&buffer->glframebuffer); + _mesa_free(buffer); + } +} + + +int +glFBDevGetBufferAttrib( const GLFBDevBufferPtr buffer, int attrib) +{ + (void) buffer; + (void) attrib; + return -1; +} + + +GLFBDevBufferPtr +glFBDevGetCurrentDrawBuffer( void ) +{ + GLFBDevContextPtr fbdevctx = glFBDevGetCurrentContext(); + if (fbdevctx) + return fbdevctx->drawBuffer; + else + return NULL; +} + + +GLFBDevBufferPtr +glFBDevGetCurrentReadBuffer( void ) +{ + GLFBDevContextPtr fbdevctx = glFBDevGetCurrentContext(); + if (fbdevctx) + return fbdevctx->readBuffer; + else + return NULL; +} + + +void +glFBDevSwapBuffers( GLFBDevBufferPtr buffer ) +{ + GLFBDevContextPtr fbdevctx = glFBDevGetCurrentContext(); + + if (!buffer || !buffer->visual->glvisual.doubleBufferMode) + return; + + /* check if swapping currently bound buffer */ + if (fbdevctx->drawBuffer == buffer) { + /* flush pending rendering */ + _mesa_notifySwapBuffers(&fbdevctx->glcontext); + } + + ASSERT(buffer->frontStart); + ASSERT(buffer->backStart); + _mesa_memcpy(buffer->frontStart, buffer->backStart, buffer->size); +} + + +GLFBDevContextPtr +glFBDevCreateContext( const GLFBDevVisualPtr visual, GLFBDevContextPtr share ) +{ + GLFBDevContextPtr ctx; + GLcontext *glctx; + + ASSERT(visual); + + ctx = CALLOC_STRUCT(GLFBDevContextRec); + if (!ctx) + return NULL; + + if (!_mesa_initialize_context(&ctx->glcontext, &visual->glvisual, + share ? &share->glcontext : NULL, + (void *) ctx, GL_FALSE)) { + _mesa_free(ctx); + return NULL; + } + + ctx->visual = visual; + + /* Create module contexts */ + glctx = (GLcontext *) &ctx->glcontext; + init_core_functions( glctx ); + _swrast_CreateContext( glctx ); + _ac_CreateContext( glctx ); + _tnl_CreateContext( glctx ); + _swsetup_CreateContext( glctx ); + _swsetup_Wakeup( glctx ); + + /* swrast init */ + { + struct swrast_device_driver *swdd; + swdd = _swrast_GetDeviceDriverReference( glctx ); + swdd->SetBuffer = set_buffer; + if (visual->pixelFormat == PF_B8G8R8) { + swdd->WriteRGBASpan = write_rgba_span_B8G8R8; + swdd->WriteRGBSpan = write_rgb_span_B8G8R8; + swdd->WriteMonoRGBASpan = write_monorgba_span_B8G8R8; + swdd->WriteRGBAPixels = write_rgba_pixels_B8G8R8; + swdd->WriteMonoRGBAPixels = write_monorgba_pixels_B8G8R8; + swdd->ReadRGBASpan = read_rgba_span_B8G8R8; + swdd->ReadRGBAPixels = read_rgba_pixels_B8G8R8; + } + else if (visual->pixelFormat == PF_B8G8R8A8) { + swdd->WriteRGBASpan = write_rgba_span_B8G8R8A8; + swdd->WriteRGBSpan = write_rgb_span_B8G8R8A8; + swdd->WriteMonoRGBASpan = write_monorgba_span_B8G8R8A8; + swdd->WriteRGBAPixels = write_rgba_pixels_B8G8R8A8; + swdd->WriteMonoRGBAPixels = write_monorgba_pixels_B8G8R8A8; + swdd->ReadRGBASpan = read_rgba_span_B8G8R8A8; + swdd->ReadRGBAPixels = read_rgba_pixels_B8G8R8A8; + } + else if (visual->pixelFormat == PF_B5G6R5) { + swdd->WriteRGBASpan = write_rgba_span_B5G6R5; + swdd->WriteRGBSpan = write_rgb_span_B5G6R5; + swdd->WriteMonoRGBASpan = write_monorgba_span_B5G6R5; + swdd->WriteRGBAPixels = write_rgba_pixels_B5G6R5; + swdd->WriteMonoRGBAPixels = write_monorgba_pixels_B5G6R5; + swdd->ReadRGBASpan = read_rgba_span_B5G6R5; + swdd->ReadRGBAPixels = read_rgba_pixels_B5G6R5; + } + else if (visual->pixelFormat == PF_B5G5R5) { + swdd->WriteRGBASpan = write_rgba_span_B5G5R5; + swdd->WriteRGBSpan = write_rgb_span_B5G5R5; + swdd->WriteMonoRGBASpan = write_monorgba_span_B5G5R5; + swdd->WriteRGBAPixels = write_rgba_pixels_B5G5R5; + swdd->WriteMonoRGBAPixels = write_monorgba_pixels_B5G5R5; + swdd->ReadRGBASpan = read_rgba_span_B5G5R5; + swdd->ReadRGBAPixels = read_rgba_pixels_B5G5R5; + } + else if (visual->pixelFormat == PF_CI8) { + swdd->WriteCI32Span = write_index32_span_CI8; + swdd->WriteCI8Span = write_index8_span_CI8; + swdd->WriteMonoCISpan = write_monoindex_span_CI8; + swdd->WriteCI32Pixels = write_index_pixels_CI8; + swdd->WriteMonoCIPixels = write_monoindex_pixels_CI8; + swdd->ReadCI32Span = read_index_span_CI8; + swdd->ReadCI32Pixels = read_index_pixels_CI8; + } + else { + _mesa_printf("bad pixelformat: %d\n", visual->pixelFormat); + } + } + + /* use default TCL pipeline */ + { + TNLcontext *tnl = TNL_CONTEXT(glctx); + tnl->Driver.RunPipeline = _tnl_run_pipeline; + } + + _mesa_enable_sw_extensions(glctx); + + return ctx; +} + + +void +glFBDevDestroyContext( GLFBDevContextPtr context ) +{ + GLFBDevContextPtr fbdevctx = glFBDevGetCurrentContext(); + + if (context) { + if (fbdevctx == context) { + /* destroying current context */ + _mesa_make_current2(NULL, NULL, NULL); + _mesa_notifyDestroy(&context->glcontext); + } + _mesa_free_context_data(&context->glcontext); + _mesa_free(context); + } +} + + +int +glFBDevGetContextAttrib( const GLFBDevContextPtr context, int attrib) +{ + (void) context; + (void) attrib; + return -1; +} + + +GLFBDevContextPtr +glFBDevGetCurrentContext( void ) +{ + GET_CURRENT_CONTEXT(ctx); + return (GLFBDevContextPtr) ctx; +} + + +int +glFBDevMakeCurrent( GLFBDevContextPtr context, + GLFBDevBufferPtr drawBuffer, + GLFBDevBufferPtr readBuffer ) +{ + if (context && drawBuffer && readBuffer) { + /* Make sure the context's visual and the buffers' visuals match. + * XXX we might do this by comparing specific fields like bits_per_pixel, + * visual, etc. in the future. + */ + if (context->visual != drawBuffer->visual || + context->visual != readBuffer->visual) { + return 0; + } + _mesa_make_current2( &context->glcontext, + &drawBuffer->glframebuffer, + &readBuffer->glframebuffer ); + context->drawBuffer = drawBuffer; + context->readBuffer = readBuffer; + context->curBuffer = drawBuffer; + } + else { + /* unbind */ + _mesa_make_current2( NULL, NULL, NULL ); + } + + return 1; +} + +#endif /* USE_GLFBDEV_DRIVER */ + |