fxdd.c

mesa-6.5-minigui源码

	    const GLint halfWidth = width >> 1;
	    const GLint extraPixel = (width & 1);
	    for (row = 0; row < height; row++) {
	       GLubyte *d = dst;
	       for (col = 0; col < halfWidth; col++) {
		  const GLuint pixel = ((const GLuint *) src)[col];
                  *d++ = FX_rgb_scale_5[(pixel >> 11) & 0x1f];
                  *d++ = FX_rgb_scale_6[(pixel >> 5)  & 0x3f];
                  *d++ = FX_rgb_scale_5[ pixel        & 0x1f];
		  *d++ = 255;
                  *d++ = FX_rgb_scale_5[(pixel >> 27) & 0x1f];
                  *d++ = FX_rgb_scale_6[(pixel >> 21) & 0x3f];
                  *d++ = FX_rgb_scale_5[(pixel >> 16) & 0x1f];
		  *d++ = 255;
	       }
	       if (extraPixel) {
		  const GLushort pixel = src[width - 1];
                  *d++ = FX_rgb_scale_5[(pixel >> 11) & 0x1f];
                  *d++ = FX_rgb_scale_6[(pixel >> 5)  & 0x3f];
                  *d++ = FX_rgb_scale_5[ pixel        & 0x1f];
		  *d++ = 255;
	       }
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
	    /* directly memcpy 5R6G5B pixels into client's buffer */
	    const GLint widthInBytes = width * 2;
	    GLint row;
	    for (row = 0; row < height; row++) {
	       MEMCPY(dst, src, widthInBytes);
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else {
	    grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
	    END_BOARD_LOCK();
	    _swrast_ReadPixels(ctx, x, y, width, height, format, type,
			       packing, dstImage);
	    return;
	 }

	 grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
      }
      END_BOARD_LOCK();
   }
}

static void
fxDDReadPixels555 (GLcontext * ctx,
		   GLint x, GLint y,
		   GLsizei width, GLsizei height,
		   GLenum format, GLenum type,
		   const struct gl_pixelstore_attrib *packing,
		   GLvoid *dstImage)
{
   if (ctx->_ImageTransferState/* & (IMAGE_SCALE_BIAS_BIT|IMAGE_MAP_COLOR_BIT)*/) {
      _swrast_ReadPixels(ctx, x, y, width, height, format, type,
			 packing, dstImage);
      return;
   }
   else {
      fxMesaContext fxMesa = FX_CONTEXT(ctx);
      GrLfbInfo_t info;

      BEGIN_BOARD_LOCK();
      info.size = sizeof(info);
      if (grLfbLock(GR_LFB_READ_ONLY,
		    fxMesa->currentFB,
		    GR_LFBWRITEMODE_ANY,
		    GR_ORIGIN_UPPER_LEFT, FXFALSE, &info)) {
	 const GLint winX = 0;
	 const GLint winY = fxMesa->height - 1;
	 const GLint srcStride = info.strideInBytes / 2;	/* stride in GLushorts */
	 const GLushort *src = (const GLushort *) info.lfbPtr
	    + (winY - y) * srcStride + (winX + x);
	 GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, dstImage,
							width, height, format,
							type, 0, 0);
	 GLint dstStride =
	    _mesa_image_row_stride(packing, width, format, type);

	 if (format == GL_RGB && type == GL_UNSIGNED_BYTE) {
	    /* convert 5R5G5B into 8R8G8B */
	    GLint row, col;
	    const GLint halfWidth = width >> 1;
	    const GLint extraPixel = (width & 1);
	    for (row = 0; row < height; row++) {
	       GLubyte *d = dst;
	       for (col = 0; col < halfWidth; col++) {
		  const GLuint pixel = ((const GLuint *) src)[col];
                  *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >> 5)  & 0x1f];
                  *d++ = FX_rgb_scale_5[ pixel        & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >> 26) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >> 21) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >> 16) & 0x1f];
	       }
	       if (extraPixel) {
		  GLushort pixel = src[width - 1];
                  *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >> 5)  & 0x1f];
                  *d++ = FX_rgb_scale_5[ pixel        & 0x1f];
	       }
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
	    /* convert 5R6G5B into 8R8G8B8A */
	    GLint row, col;
	    const GLint halfWidth = width >> 1;
	    const GLint extraPixel = (width & 1);
	    for (row = 0; row < height; row++) {
	       GLubyte *d = dst;
	       for (col = 0; col < halfWidth; col++) {
		  const GLuint pixel = ((const GLuint *) src)[col];
                  *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >>  5) & 0x1f];
                  *d++ = FX_rgb_scale_5[ pixel        & 0x1f];
		  *d++ =  (pixel & 0x8000) ? 255 : 0;
                  *d++ = FX_rgb_scale_5[(pixel >> 26) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >> 21) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >> 16) & 0x1f];
		  *d++ =  (pixel & 0x80000000) ? 255 : 0;
	       }
	       if (extraPixel) {
		  const GLushort pixel = src[width - 1];
                  *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f];
                  *d++ = FX_rgb_scale_5[(pixel >>  5) & 0x1f];
                  *d++ = FX_rgb_scale_5[ pixel        & 0x1f];
		  *d++ =  (pixel & 0x8000) ? 255 : 0;
	       }
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else if (format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
	    /* directly memcpy 5R5G5B pixels into client's buffer */
	    const GLint widthInBytes = width * 2;
	    GLint row;
	    for (row = 0; row < height; row++) {
	       MEMCPY(dst, src, widthInBytes);
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else {
	    grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
	    END_BOARD_LOCK();
	    _swrast_ReadPixels(ctx, x, y, width, height, format, type,
			       packing, dstImage);
	    return;
	 }

	 grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
      }
      END_BOARD_LOCK();
   }
}

static void
fxDDReadPixels8888 (GLcontext * ctx,
		    GLint x, GLint y,
		    GLsizei width, GLsizei height,
		    GLenum format, GLenum type,
		    const struct gl_pixelstore_attrib *packing,
		    GLvoid *dstImage)
{
   if (ctx->_ImageTransferState/* & (IMAGE_SCALE_BIAS_BIT|IMAGE_MAP_COLOR_BIT)*/) {
      _swrast_ReadPixels(ctx, x, y, width, height, format, type,
			 packing, dstImage);
      return;
   }
   else {
      fxMesaContext fxMesa = FX_CONTEXT(ctx);
      GrLfbInfo_t info;

      BEGIN_BOARD_LOCK();
      info.size = sizeof(info);
      if (grLfbLock(GR_LFB_READ_ONLY,
		    fxMesa->currentFB,
		    GR_LFBWRITEMODE_ANY,
		    GR_ORIGIN_UPPER_LEFT, FXFALSE, &info)) {
	 const GLint winX = 0;
	 const GLint winY = fxMesa->height - 1;
	 const GLint srcStride = info.strideInBytes / 4;	/* stride in GLuints */
	 const GLuint *src = (const GLuint *) info.lfbPtr
	    + (winY - y) * srcStride + (winX + x);
	 GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, dstImage,
							width, height, format,
							type, 0, 0);
	 GLint dstStride =
	    _mesa_image_row_stride(packing, width, format, type);

	 if (format == GL_RGB && type == GL_UNSIGNED_BYTE) {
	    /* convert 8A8R8G8B into 8R8G8B */
	    GLint row, col;
	    for (row = 0; row < height; row++) {
	       GLubyte *d = dst;
	       for (col = 0; col < width; col++) {
		  const GLuint pixel = ((const GLuint *) src)[col];
                  *d++ = pixel >> 16;
                  *d++ = pixel >> 8;
                  *d++ = pixel;
	       }
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
	    /* 8A8R8G8B pixels into client's buffer */
	    GLint row, col;
	    for (row = 0; row < height; row++) {
	       GLubyte *d = dst;
	       for (col = 0; col < width; col++) {
		  const GLuint pixel = ((const GLuint *) src)[col];
                  *d++ = pixel >> 16;
                  *d++ = pixel >> 8;
                  *d++ = pixel;
                  *d++ = pixel >> 24;
	       }
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
	    /* convert 8A8R8G8B into 5R6G5B */
	    GLint row, col;
	    for (row = 0; row < height; row++) {
	       GLushort *d = (GLushort *)dst;
	       for (col = 0; col < width; col++) {
		  const GLuint pixel = ((const GLuint *) src)[col];
                  *d++ = (((pixel >> 16) & 0xf8) << 8) |
                         (((pixel >>  8) & 0xfc) << 3) |
                          ((pixel        & 0xf8) >> 3);
	       }
	       dst += dstStride;
	       src -= srcStride;
	    }
	 }
	 else {
	    grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
	    END_BOARD_LOCK();
	    _swrast_ReadPixels(ctx, x, y, width, height, format, type,
			       packing, dstImage);
	    return;
	 }

	 grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
      }
      END_BOARD_LOCK();
   }
}


static void
fxDDDrawPixels555 (GLcontext * ctx, GLint x, GLint y,
                   GLsizei width, GLsizei height,
                   GLenum format, GLenum type,
                   const struct gl_pixelstore_attrib *unpack,
                   const GLvoid * pixels)
{
   fxMesaContext fxMesa = FX_CONTEXT(ctx);
   SWcontext *swrast = SWRAST_CONTEXT(ctx);
   GrLfbInfo_t info;
   const struct gl_pixelstore_attrib *finalUnpack;
   struct gl_pixelstore_attrib scissoredUnpack;

   if (ctx->Pixel.ZoomX != 1.0F ||
       ctx->Pixel.ZoomY != 1.0F ||
       (ctx->_ImageTransferState & (IMAGE_SCALE_BIAS_BIT|
				    IMAGE_MAP_COLOR_BIT)) ||
       (swrast->_RasterMask & (ALPHATEST_BIT |
			      /*BLEND_BIT |*/   /* blending ok, through pixpipe */
			      DEPTH_BIT |       /* could be done with RGB:DEPTH */
			      FOG_BIT |         /* could be done with RGB:DEPTH */
			      LOGIC_OP_BIT |
			      /*CLIP_BIT |*/    /* clipping ok, below */
			      STENCIL_BIT |
			      MASKING_BIT |
			      MULTI_DRAW_BIT |
			      OCCLUSION_BIT |   /* nope! at least not yet */
			      TEXTURE_BIT |
			      FRAGPROG_BIT)) ||
       fxMesa->fallback)
   {
      _swrast_DrawPixels( ctx, x, y, width, height, format, type,
			  unpack, pixels );
      return;
   }

   /* make sure the pixelpipe is configured correctly */
   fxSetupFXUnits(ctx);

   /* FIXME! _RasterMask & CLIP_BIT gets set if we're out of Viewport, also! */
   if (ctx->Scissor.Enabled) {
      /* This is a bit tricky, but by carefully adjusting the px, py,
       * width, height, skipPixels and skipRows values we can do
       * scissoring without special code in the rendering loop.
       */

      /* we'll construct a new pixelstore struct */
      finalUnpack = &scissoredUnpack;
      scissoredUnpack = *unpack;
      if (scissoredUnpack.RowLength == 0)
	 scissoredUnpack.RowLength = width;

      /* clip left */
      if (x < ctx->Scissor.X) {
	 scissoredUnpack.SkipPixels += (ctx->Scissor.X - x);
	 width -= (ctx->Scissor.X - x);
	 x = ctx->Scissor.X;
      }
      /* clip right */
      if (x + width >= ctx->Scissor.X + ctx->Scissor.Width) {
	 width -= (x + width - (ctx->Scissor.X + ctx->Scissor.Width));
      }
      /* clip bottom */
      if (y < ctx->Scissor.Y) {
	 scissoredUnpack.SkipRows += (ctx->Scissor.Y - y);
	 height -= (ctx->Scissor.Y - y);
	 y = ctx->Scissor.Y;
      }
      /* clip top */
      if (y + height >= ctx->Scissor.Y + ctx->Scissor.Height) {
	 height -= (y + height - (ctx->Scissor.Y + ctx->Scissor.Height));
      }

      if (width <= 0 || height <= 0)
	 return;
   }
   else {
      finalUnpack = unpack;
   }

   info.size = sizeof(info);
   if (!grLfbLock(GR_LFB_WRITE_ONLY,
                  fxMesa->currentFB,
                  GR_LFBWRITEMODE_1555,
                  GR_ORIGIN_LOWER_LEFT, FXTRUE, &info)) {
      _swrast_DrawPixels(ctx, x, y, width, height, format, type, finalUnpack, pixels);
      return;
   }

   {
      const GLint winX = 0;
      const GLint winY = 0;

      const GLint dstStride = info.strideInBytes / 2;	/* stride in GLushorts */
      GLushort *dst = (GLushort *) info.lfbPtr + (winY + y) * dstStride + (winX + x);

      if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
         GLint row;
         for (row = 0; row < height; row++) {
	     GLubyte *src = (GLubyte *) _mesa_image_address2d(finalUnpack,
                                  pixels, width, height, format, type, row, 0);
	     GLint col;
	     for (col = 0; col < width; col++) {
                 dst[col] = TDFXPACKCOLOR1555(src[2], src[1], src[0], src[3]);
                 src += 4;
             }
             dst += dstStride;
         }
      }
      else if (format == GL_RGB && type == GL_UNSIGNED_BYTE) {
         GLint row;
         for (row = 0; row < height; row++) {
	     GLubyte *src = (GLubyte *) _mesa_image_address2d(finalUnpack,
                                  pixels, width, height, format, type, row, 0);
	     GLint col;
	     for (col = 0; col < width; col++) {
                 dst[col] = TDFXPACKCOLOR1555(src[2], src[1], src[0], 255);
                 src += 3;
             }
             dst += dstStride;
         }
      }
      else {
         grLfbUnlock(GR_LFB_WRITE_ONLY, fxMesa->currentFB);
         _swrast_DrawPixels(ctx, x, y, width, height, format, type, finalUnpack, pixels);
         return;
      }

   }

   grLfbUnlock(GR_LFB_WRITE_ONLY, fxMesa->currentFB);
}


static void
fxDDDrawPixels565 (GLcontext * ctx, GLint x, GLint y,
                   GLsizei width, GLsizei height,
                   GLenum format, GLenum type,
                   const struct gl_pixelstore_attrib *unpack,
                   const GLvoid * pixels)
{
   fxMesaContext fxMesa = FX_CONTEXT(ctx);
   SWcontext *swrast = SWRAST_CONTEXT(ctx);
   GrLfbInfo_t info;
   const struct gl_pixelstore_attrib *finalUnpack;