idirectfbgl_mesa.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

          ((S[GCOMP]) <<  8) | \
          ((S[BCOMP])      ) )
#define FETCH_PIXEL(D, P) \
   D[RCOMP] = ((*P & 0x00ff0000) >> 16); \
   D[GCOMP] = ((*P & 0x0000ff00) >>  8); \
   D[BCOMP] = ((*P & 0x000000ff)      ); \
   D[ACOMP] = 0xff

#include "swrast/s_spantemp.h"
   
/* ARGB */
#define NAME(PREFIX) PREFIX##_ARGB
#define FORMAT GL_RGBA8
#define RB_TYPE GLubyte
#define SPAN_VARS \
   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
#define INIT_PIXEL_PTR(P, X, Y) \
   GLuint *P = (GLuint*) (data->video.end - (Y) * data->video.pitch + (X) * 4);
#define INC_PIXEL_PTR(P) P += 1
#define STORE_PIXEL_RGB(P, X, Y, S) \
   *P = ( 0xff000000         | \
          ((S[RCOMP]) << 16) | \
          ((S[GCOMP]) <<  8) | \
          ((S[BCOMP])      ) )
#define STORE_PIXEL(P, X, Y, S) \
   *P = ( ((S[ACOMP]) << 24) | \
          ((S[RCOMP]) << 16) | \
          ((S[GCOMP]) <<  8) | \
          ((S[BCOMP])      ) )
#define FETCH_PIXEL(D, P) \
   D[RCOMP] = ((*P & 0x00ff0000) >> 16); \
   D[GCOMP] = ((*P & 0x0000ff00) >>  8); \
   D[BCOMP] = ((*P & 0x000000ff)      ); \
   D[ACOMP] = ((*P & 0xff000000) >> 24)

#include "swrast/s_spantemp.h"

/* AiRGB */
#define NAME(PREFIX) PREFIX##_AiRGB
#define FORMAT GL_RGBA8
#define RB_TYPE GLubyte
#define SPAN_VARS \
   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
#define INIT_PIXEL_PTR(P, X, Y) \
   GLuint *P = (GLuint*) (data->video.end - (Y) * data->video.pitch + (X) * 4);
#define INC_PIXEL_PTR(P) P += 1
#define STORE_PIXEL_RGB(P, X, Y, S) \
   *P = ( ((S[RCOMP]) << 16) | \
          ((S[GCOMP]) <<  8) | \
          ((S[BCOMP])      ) )
#define STORE_PIXEL(P, X, Y, S) \
   *P = ( (((S[ACOMP]) ^ 0xff) << 24) | \
          (((S[RCOMP])       ) << 16) | \
          (((S[GCOMP])       ) <<  8) | \
          (((S[BCOMP])       )      ) )
#define FETCH_PIXEL(D, P) \
   D[RCOMP] =  ((*P & 0x00ff0000) >> 16); \
   D[GCOMP] =  ((*P & 0x0000ff00) >>  8); \
   D[BCOMP] =  ((*P & 0x000000ff)      ); \
   D[ACOMP] = (((*P & 0xff000000) >> 24) ^ 0xff)

#include "swrast/s_spantemp.h"


/*****************************************************************************/

static bool
directfbgl_init_visual( GLvisual              *visual,
                        DFBSurfacePixelFormat  format )
{
     GLboolean  rgbFlag        = GL_TRUE;
     GLboolean  dbFlag         = GL_FALSE;
     GLboolean  stereoFlag     = GL_FALSE;
     GLint      redBits        = 0;
     GLint      blueBits       = 0;
     GLint      greenBits      = 0;
     GLint      alphaBits      = 0;
     GLint      indexBits      = 0;
     GLint      depthBits      = 0;
     GLint      stencilBits    = 0;
     GLint      accumRedBits   = 0;
     GLint      accumGreenBits = 0;
     GLint      accumBlueBits  = 0;
     GLint      accumAlphaBits = 0;
     GLint      numSamples     = 0;

     /* FIXME: LUT8 support. */
     switch (format) {
          case DSPF_RGB332:
               redBits   = 3;
               greenBits = 3;
               blueBits  = 2;
               break;
          case DSPF_ARGB4444:
               alphaBits = 4;
          case DSPF_RGB444:
               redBits   = 4;
               greenBits = 4;
               blueBits  = 4;
               break;
          case DSPF_ARGB2554:
               alphaBits = 2;
               redBits   = 5;
               greenBits = 5;
               blueBits  = 4;
               break;
          case DSPF_ARGB1555:
               alphaBits = 1;
          case DSPF_RGB555:
               redBits   = 5;
               greenBits = 5;
               blueBits  = 5;
               break;
          case DSPF_RGB16:
               redBits   = 5;
               greenBits = 6;
               blueBits  = 5;
               break;
          case DSPF_ARGB:
          case DSPF_AiRGB:
               alphaBits = 8;
          case DSPF_RGB24:
          case DSPF_RGB32:
               redBits   = 8;
               greenBits = 8;
               blueBits  = 8;
               break;
          default:
               D_WARN( "unsupported pixelformat" );
               return false;
     }

     if (rgbFlag) {
          accumRedBits   = redBits;
          accumGreenBits = greenBits;
          accumBlueBits  = blueBits;
          accumAlphaBits = alphaBits;
          depthBits      = redBits + greenBits + blueBits;
          stencilBits    = alphaBits;
     } else
          depthBits      = 8;

     return _mesa_initialize_visual( visual,
                                     rgbFlag, dbFlag, stereoFlag,
                                     redBits, greenBits, blueBits, alphaBits,
                                     indexBits, depthBits, stencilBits,
                                     accumRedBits, accumGreenBits,
                                     accumBlueBits, accumAlphaBits,
                                     numSamples );
}

static bool
directfbgl_create_context( GLcontext        *context,
                           GLframebuffer    *framebuffer,
                           GLvisual         *visual,
                           IDirectFBGL_data *data )
{
     struct dd_function_table functions;
     
     _mesa_initialize_framebuffer( framebuffer, visual ); 
     
     _mesa_init_driver_functions( &functions );
     functions.GetString     = dfbGetString;
     functions.UpdateState   = dfbUpdateState;
     functions.GetBufferSize = dfbGetBufferSize;
     functions.Viewport      = dfbSetViewport;
     functions.Clear         = dfbClear;
     
     if (!_mesa_initialize_context( context, visual, NULL,
                                    &functions, (void*) data )) {
          D_DEBUG( "DirectFBGL/Mesa: _mesa_initialize_context() failed.\n" );
          _mesa_free_framebuffer_data( framebuffer );
          return false;
     }

     _swrast_CreateContext( context );
     _vbo_CreateContext( context );
     _tnl_CreateContext( context );
     _swsetup_CreateContext( context );
     _swsetup_Wakeup( context );

     _mesa_init_renderbuffer( &data->render, 0 );
     data->render.InternalFormat = GL_RGBA;
     data->render._BaseFormat    = GL_RGBA;
     data->render.DataType       = GL_UNSIGNED_BYTE;
     data->render.Data           = data->video.start;
     data->render.Delete         = dfbDeleteRenderbuffer;
     data->render.AllocStorage   = dfbRenderbufferStorage;
     
     switch (data->format) {
          case DSPF_RGB332:
               data->render.GetRow        = get_row_RGB332;
               data->render.GetValues     = get_values_RGB332;
               data->render.PutRow        = put_row_RGB332;
               data->render.PutRowRGB     = put_row_rgb_RGB332;
               data->render.PutMonoRow    = put_mono_row_RGB332;
               data->render.PutValues     = put_values_RGB332;
               data->render.PutMonoValues = put_mono_values_RGB332;
               break;
          case DSPF_ARGB4444: 
               data->render.GetRow        = get_row_ARGB4444;
               data->render.GetValues     = get_values_ARGB4444;
               data->render.PutRow        = put_row_ARGB4444;
               data->render.PutRowRGB     = put_row_rgb_ARGB4444;
               data->render.PutMonoRow    = put_mono_row_ARGB4444;
               data->render.PutValues     = put_values_ARGB4444;
               data->render.PutMonoValues = put_mono_values_ARGB4444;
               break;
          case DSPF_RGB444: 
               data->render.GetRow        = get_row_RGB444;
               data->render.GetValues     = get_values_RGB444;
               data->render.PutRow        = put_row_RGB444;
               data->render.PutRowRGB     = put_row_rgb_RGB444;
               data->render.PutMonoRow    = put_mono_row_RGB444;
               data->render.PutValues     = put_values_RGB444;
               data->render.PutMonoValues = put_mono_values_RGB444;
               break;
          case DSPF_ARGB2554: 
               data->render.GetRow        = get_row_ARGB2554;
               data->render.GetValues     = get_values_ARGB2554;
               data->render.PutRow        = put_row_ARGB2554;
               data->render.PutRowRGB     = put_row_rgb_ARGB2554;
               data->render.PutMonoRow    = put_mono_row_ARGB2554;
               data->render.PutValues     = put_values_ARGB2554;
               data->render.PutMonoValues = put_mono_values_ARGB2554;
               break;
          case DSPF_ARGB1555:
               data->render.GetRow        = get_row_ARGB1555;
               data->render.GetValues     = get_values_ARGB1555;
               data->render.PutRow        = put_row_ARGB1555;
               data->render.PutRowRGB     = put_row_rgb_ARGB1555;
               data->render.PutMonoRow    = put_mono_row_ARGB1555;
               data->render.PutValues     = put_values_ARGB1555;
               data->render.PutMonoValues = put_mono_values_ARGB1555;
               break;
          case DSPF_RGB555:
               data->render.GetRow        = get_row_RGB555;
               data->render.GetValues     = get_values_RGB555;
               data->render.PutRow        = put_row_RGB555;
               data->render.PutRowRGB     = put_row_rgb_RGB555;
               data->render.PutMonoRow    = put_mono_row_RGB555;
               data->render.PutValues     = put_values_RGB555;
               data->render.PutMonoValues = put_mono_values_RGB555;
               break;
          case DSPF_RGB16:
               data->render.GetRow        = get_row_RGB16;
               data->render.GetValues     = get_values_RGB16;
               data->render.PutRow        = put_row_RGB16;
               data->render.PutRowRGB     = put_row_rgb_RGB16;
               data->render.PutMonoRow    = put_mono_row_RGB16;
               data->render.PutValues     = put_values_RGB16;
               data->render.PutMonoValues = put_mono_values_RGB16;
               break;
          case DSPF_RGB24:
               data->render.GetRow        = get_row_RGB24;
               data->render.GetValues     = get_values_RGB24;
               data->render.PutRow        = put_row_RGB24;
               data->render.PutRowRGB     = put_row_rgb_RGB24;
               data->render.PutMonoRow    = put_mono_row_RGB24;
               data->render.PutValues     = put_values_RGB24;
               data->render.PutMonoValues = put_mono_values_RGB24;
               break;
          case DSPF_RGB32:
               data->render.GetRow        = get_row_RGB32;
               data->render.GetValues     = get_values_RGB32;
               data->render.PutRow        = put_row_RGB32;
               data->render.PutRowRGB     = put_row_rgb_RGB32;
               data->render.PutMonoRow    = put_mono_row_RGB32;
               data->render.PutValues     = put_values_RGB32;
               data->render.PutMonoValues = put_mono_values_RGB32;
               break;
          case DSPF_ARGB:
               data->render.GetRow        = get_row_ARGB;
               data->render.GetValues     = get_values_ARGB;
               data->render.PutRow        = put_row_ARGB;
               data->render.PutRowRGB     = put_row_rgb_ARGB;
               data->render.PutMonoRow    = put_mono_row_ARGB;
               data->render.PutValues     = put_values_ARGB;
               data->render.PutMonoValues = put_mono_values_ARGB;
               break;
          case DSPF_AiRGB:
               data->render.GetRow        = get_row_AiRGB;
               data->render.GetValues     = get_values_AiRGB;
               data->render.PutRow        = put_row_AiRGB;
               data->render.PutRowRGB     = put_row_rgb_AiRGB;
               data->render.PutMonoRow    = put_mono_row_AiRGB;
               data->render.PutValues     = put_values_AiRGB;
               data->render.PutMonoValues = put_mono_values_AiRGB;
               break;
          default:
               D_BUG( "unexpected pixelformat" );
               return false;
     }

     data->render.Width = data->width;
     data->render.Height = data->height;

     _mesa_add_renderbuffer( framebuffer, BUFFER_FRONT_LEFT, &data->render );
     
     _mesa_add_soft_renderbuffers( framebuffer,
                                   GL_FALSE,
                                   visual->haveDepthBuffer,
                                   visual->haveStencilBuffer,
                                   visual->haveAccumBuffer,
                                   GL_FALSE,
                                   GL_FALSE );

     TNL_CONTEXT( context )->Driver.RunPipeline = _tnl_run_pipeline;

     _mesa_enable_sw_extensions( context );
     
     return true;
}

static void
directfbgl_destroy_context( GLcontext     *context,
                            GLframebuffer *framebuffer )
{
     _swsetup_DestroyContext( context );
     _swrast_DestroyContext( context );
     _tnl_DestroyContext( context );
     _vbo_DestroyContext( context );
     //_mesa_free_framebuffer_data( framebuffer );
     _mesa_free_context_data( context );
}