idirectfbgl_mesa.c

mesa-6.5-minigui源码

/* RGB332 */
#define NAME(PREFIX) PREFIX##_RGB332
#define FORMAT GL_RGBA8
#define SPAN_VARS \
   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
#define INIT_PIXEL_PTR(P, X, Y) \
   GLubyte *P = data->video.end - (Y) * data->video.pitch + (X);
#define INC_PIXEL_PTR(P) P += 1
#define STORE_PIXEL(P, X, Y, S) \
   *P = ( (((S[RCOMP]) & 0xe0)) | (((S[GCOMP]) & 0xe0) >> 3) | ((S[BCOMP]) >> 6) )
#define FETCH_PIXEL(D, P) \
   D[RCOMP] = ((*P & 0xe0)     ); \
   D[GCOMP] = ((*P & 0x1c) << 3); \
   D[BCOMP] = ((*P & 0x03) << 6); \
   D[ACOMP] = 0xff

#include "swrast/s_spantemp.h"

/* ARGB1555 */
#define NAME(PREFIX) PREFIX##_ARGB1555
#define FORMAT GL_RGBA8
#define SPAN_VARS \
   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
#define INIT_PIXEL_PTR(P, X, Y) \
   GLushort *P = (GLushort *) (data->video.end - (Y) * data->video.pitch + (X) * 2);
#define INC_PIXEL_PTR(P) P += 1
#define STORE_PIXEL(P, X, Y, S) \
   *P = ( (((S[RCOMP]) & 0xf8) << 7) | (((S[GCOMP]) & 0xf8) << 2) | ((S[BCOMP]) >> 3) )
#define FETCH_PIXEL(D, P) \
   D[RCOMP] = ((*P & 0x7c00) >> 7); \
   D[GCOMP] = ((*P & 0x03e0) >> 2); \
   D[BCOMP] = ((*P & 0x001f) << 3); \
   D[ACOMP] = ((*P & 0x8000) ? 0xff : 0)

#include "swrast/s_spantemp.h"

/* RGB16 */
#define NAME(PREFIX) PREFIX##_RGB16
#define FORMAT GL_RGBA8
#define SPAN_VARS \
   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
#define INIT_PIXEL_PTR(P, X, Y) \
   GLushort *P = (GLushort *) (data->video.end - (Y) * data->video.pitch + (X) * 2);
#define INC_PIXEL_PTR(P) P += 1
#define STORE_PIXEL(P, X, Y, S) \
   *P = ( (((S[RCOMP]) & 0xf8) << 8) | (((S[GCOMP]) & 0xfc) << 3) | ((S[BCOMP]) >> 3) )
#define FETCH_PIXEL(D, P) \
   D[RCOMP] = ((*P & 0xf800) >> 8); \
   D[GCOMP] = ((*P & 0x07e0) >> 3); \
   D[BCOMP] = ((*P & 0x001f) << 3); \
   D[ACOMP] = 0xff

#include "swrast/s_spantemp.h"

/* RGB24 */
#define NAME(PREFIX) PREFIX##_RGB24
#define FORMAT GL_RGBA8
#define SPAN_VARS \
   IDirectFBGL_data *data = ctx->DriverCtx;
#define INIT_PIXEL_PTR(P, X, Y) \
   GLubyte *P = data->video.end - (Y) * data->video.pitch + (X) * 3;
#define INC_PIXEL_PTR(P) P += 3
#define STORE_PIXEL(P, X, Y, S) \
   P[0] = S[BCOMP];  P[1] = S[GCOMP];  P[2] = S[BCOMP]
#define FETCH_PIXEL(D, P) \
   D[RCOMP] = P[2];  D[GCOMP] = P[1];  D[BCOMP] = P[0]; D[ACOMP] = 0xff

#include "swrast/s_spantemp.h"

/* RGB32 */
#define NAME(PREFIX) PREFIX##_RGB32
#define FORMAT GL_RGBA8
#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(P, X, Y, S) \
   *P = ( ((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] = 0xff

#include "swrast/s_spantemp.h"
   
/* ARGB */
#define NAME(PREFIX) PREFIX##_ARGB
#define FORMAT GL_RGBA8
#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 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 = ( ((0xff - (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] = (0xff - ((*P & 0xff000000) >> 24))

#include "swrast/s_spantemp.h"


static bool
dfb_mesa_setup_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_ARGB1555:
               redBits   = 5;
               greenBits = 5;
               blueBits  = 5;
               alphaBits = 1;
               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
dfb_mesa_create_context( GLcontext             *context,
                         GLframebuffer         *framebuffer,
                         GLvisual              *visual,
                         DFBSurfacePixelFormat  format,
                         IDirectFBGL_data      *data )
{
     struct dd_function_table     functions;
     struct swrast_device_driver *swdd;
     
     _mesa_initialize_framebuffer( framebuffer, visual ); 
     
     _mesa_init_driver_functions( &functions );
     functions.GetString     = get_string;
     functions.UpdateState   = update_state;
     functions.GetBufferSize = get_buffer_size;
     functions.Viewport      = set_viewport;
     
     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 );
     _ac_CreateContext( context );
     _tnl_CreateContext( context );
     _swsetup_CreateContext( context );
     _swsetup_Wakeup( context );
     
     swdd = _swrast_GetDeviceDriverReference( context );
     swdd->SetBuffer = set_buffer;

     _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         = delete_renderbuffer;
     data->render.AllocStorage   = renderbuffer_storage;
     
     switch (format) {
          case DSPF_RGB332:
               data->render.GetRow        = get_row_RGB332;
               data->render.GetValues     = get_values_RGB332;
               data->render.PutRow        = put_row_RGB332;
               data->render.PutMonoRow    = put_mono_row_RGB332;
               data->render.PutValues     = put_values_RGB332;
               data->render.PutMonoValues = put_mono_values_RGB332;
               break;
          case DSPF_ARGB1555:
               data->render.GetRow        = get_row_ARGB1555;
               data->render.GetValues     = get_values_ARGB1555;
               data->render.PutRow        = put_row_ARGB1555;
               data->render.PutMonoRow    = put_mono_row_ARGB1555;
               data->render.PutValues     = put_values_ARGB1555;
               data->render.PutMonoValues = put_mono_values_ARGB1555;
               break;
          case DSPF_RGB16:
               data->render.GetRow        = get_row_RGB16;
               data->render.GetValues     = get_values_RGB16;
               data->render.PutRow        = put_row_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.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.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.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.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;
     }

     _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 );

     _mesa_make_current( context, framebuffer, framebuffer );
     
     return true;
}

static void
dfb_mesa_destroy_context( GLcontext     *context,
                          GLframebuffer *framebuffer )
{
     _mesa_make_current( NULL, NULL, NULL );
     _mesa_free_framebuffer_data( framebuffer );
     _mesa_notifyDestroy( context );
     _mesa_free_context_data( context );
}