image.c

来自「mesa-6.5-minigui源码」· C语言 代码 · 共 1,907 行 · 第 1/5 页

                     dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
                  }
                  break;
               case GL_BGRA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
                     dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
                     dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
                  }
                  break;
               case GL_ABGR_EXT:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
                     dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
                     dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
                     dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
                  }
                  break;
               default:
                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
            }
         }
         break;
      case GL_BYTE:
         {
            GLbyte *dst = (GLbyte *) dstAddr;
            switch (dstFormat) {
               case GL_RED:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
                  break;
               case GL_GREEN:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
                  break;
               case GL_BLUE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
                  break;
               case GL_ALPHA:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
                  break;
               case GL_LUMINANCE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_BYTE(luminance[i]);
                  break;
               case GL_LUMINANCE_ALPHA:
                  for (i=0;i<n;i++) {
                     dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
                     dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
                  }
                  break;
               case GL_RGB:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
                     dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
                  }
                  break;
               case GL_RGBA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
                     dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
                     dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
                  }
                  break;
               case GL_BGR:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
                     dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
                  }
                  break;
               case GL_BGRA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
                     dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
                     dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
                  }
               case GL_ABGR_EXT:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
                     dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
                     dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
                     dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
                  }
                  break;
               default:
                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
            }
         }
         break;
      case GL_UNSIGNED_SHORT:
         {
            GLushort *dst = (GLushort *) dstAddr;
            switch (dstFormat) {
               case GL_RED:
                  for (i=0;i<n;i++)
                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][RCOMP]);
                  break;
               case GL_GREEN:
                  for (i=0;i<n;i++)
                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][GCOMP]);
                  break;
               case GL_BLUE:
                  for (i=0;i<n;i++)
                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][BCOMP]);
                  break;
               case GL_ALPHA:
                  for (i=0;i<n;i++)
                     CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][ACOMP]);
                  break;
               case GL_LUMINANCE:
                  for (i=0;i<n;i++)
                     UNCLAMPED_FLOAT_TO_USHORT(dst[i], luminance[i]);
                  break;
               case GL_LUMINANCE_ALPHA:
                  for (i=0;i<n;i++) {
                     UNCLAMPED_FLOAT_TO_USHORT(dst[i*2+0], luminance[i]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*2+1], rgba[i][ACOMP]);
                  }
                  break;
               case GL_RGB:
                  for (i=0;i<n;i++) {
                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][RCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][BCOMP]);
                  }
                  break;
               case GL_RGBA:
                  for (i=0;i<n;i++) {
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][RCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][BCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
                  }
                  break;
               case GL_BGR:
                  for (i=0;i<n;i++) {
                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][BCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][RCOMP]);
                  }
                  break;
               case GL_BGRA:
                  for (i=0;i<n;i++) {
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][BCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][RCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
                  }
                  break;
               case GL_ABGR_EXT:
                  for (i=0;i<n;i++) {
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][ACOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][BCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][GCOMP]);
                     CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][RCOMP]);
                  }
                  break;
               default:
                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
            }
            if (dstPacking->SwapBytes) {
               _mesa_swap2( (GLushort *) dst, n * comps);
            }
         }
         break;
      case GL_SHORT:
         {
            GLshort *dst = (GLshort *) dstAddr;
            switch (dstFormat) {
               case GL_RED:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
                  break;
               case GL_GREEN:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
                  break;
               case GL_BLUE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
                  break;
               case GL_ALPHA:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
                  break;
               case GL_LUMINANCE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_SHORT(luminance[i]);
                  break;
               case GL_LUMINANCE_ALPHA:
                  for (i=0;i<n;i++) {
                     dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
                     dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
                  }
                  break;
               case GL_RGB:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
                     dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
                  }
                  break;
               case GL_RGBA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
                     dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
                     dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
                  }
                  break;
               case GL_BGR:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
                     dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
                  }
                  break;
               case GL_BGRA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
                     dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
                     dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
                  }
               case GL_ABGR_EXT:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
                     dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
                     dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
                     dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
                  }
                  break;
               default:
                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
            }
            if (dstPacking->SwapBytes) {
               _mesa_swap2( (GLushort *) dst, n * comps );
            }
         }
         break;
      case GL_UNSIGNED_INT:
         {
            GLuint *dst = (GLuint *) dstAddr;
            switch (dstFormat) {
               case GL_RED:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_UINT(rgba[i][RCOMP]);
                  break;
               case GL_GREEN:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_UINT(rgba[i][GCOMP]);
                  break;
               case GL_BLUE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_UINT(rgba[i][BCOMP]);
                  break;
               case GL_ALPHA:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_UINT(rgba[i][ACOMP]);
                  break;
               case GL_LUMINANCE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_UINT(luminance[i]);
                  break;
               case GL_LUMINANCE_ALPHA:
                  for (i=0;i<n;i++) {
                     dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
                     dst[i*2+1] = FLOAT_TO_UINT(rgba[i][ACOMP]);
                  }
                  break;
               case GL_RGB:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
                     dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
                  }
                  break;
               case GL_RGBA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
                     dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
                     dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
                  }
                  break;
               case GL_BGR:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
                     dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
                  }
                  break;
               case GL_BGRA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
                     dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
                     dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
                  }
                  break;
               case GL_ABGR_EXT:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_UINT(rgba[i][ACOMP]);
                     dst[i*4+1] = FLOAT_TO_UINT(rgba[i][BCOMP]);
                     dst[i*4+2] = FLOAT_TO_UINT(rgba[i][GCOMP]);
                     dst[i*4+3] = FLOAT_TO_UINT(rgba[i][RCOMP]);
                  }
                  break;
               default:
                  _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
            }
            if (dstPacking->SwapBytes) {
               _mesa_swap4( (GLuint *) dst, n * comps );
            }
         }
         break;
      case GL_INT:
         {
            GLint *dst = (GLint *) dstAddr;
            switch (dstFormat) {
               case GL_RED:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_INT(rgba[i][RCOMP]);
                  break;
               case GL_GREEN:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_INT(rgba[i][GCOMP]);
                  break;
               case GL_BLUE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_INT(rgba[i][BCOMP]);
                  break;
               case GL_ALPHA:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_INT(rgba[i][ACOMP]);
                  break;
               case GL_LUMINANCE:
                  for (i=0;i<n;i++)
                     dst[i] = FLOAT_TO_INT(luminance[i]);
                  break;
               case GL_LUMINANCE_ALPHA:
                  for (i=0;i<n;i++) {
                     dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
                     dst[i*2+1] = FLOAT_TO_INT(rgba[i][ACOMP]);
                  }
                  break;
               case GL_RGB:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
                     dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
                  }
                  break;
               case GL_RGBA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
                     dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
                     dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
                  }
                  break;
               case GL_BGR:
                  for (i=0;i<n;i++) {
                     dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
                     dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
                     dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
                  }
                  break;
               case GL_BGRA:
                  for (i=0;i<n;i++) {
                     dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
                     dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
                     dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
                     dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);