st_cb_accum.h File Reference

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Functions
void	st_clear_accum_buffer (GLcontext *ctx, struct gl_renderbuffer *rb)
void	st_init_accum_functions (struct dd_function_table *functions)

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Function Documentation

void st_clear_accum_buffer	(	GLcontext *	ctx,
		struct gl_renderbuffer *	rb
	)

Definition at line 95 of file acc2.c.

References acc_put_tile_rgba(), st_renderbuffer::format, pipe_screen::get_tex_surface, pipe_surface::height, PIPE_BUFFER_USAGE_CPU_WRITE, PIPE_FORMAT_R16G16B16A16_SNORM, pipe_surface_map(), pipe_surface_reference(), pipe_surface_unmap(), st_renderbuffer(), pipe_surface::stride, st_renderbuffer::surface, pipe_screen::surface_map, pipe_screen::surface_unmap, st_renderbuffer::texture, and pipe_surface::width.

{
   struct pipe_context *pipe = ctx->st->pipe;
   struct st_renderbuffer *acc_strb = st_renderbuffer(rb);
   struct pipe_surface *acc_ps = acc_strb->surface;
   const GLint xpos = ctx->DrawBuffer->_Xmin;
   const GLint ypos = ctx->DrawBuffer->_Ymin;
   const GLint width = ctx->DrawBuffer->_Xmax - xpos;
   const GLint height = ctx->DrawBuffer->_Ymax - ypos;
   const GLfloat r = ctx->Accum.ClearColor[0];
   const GLfloat g = ctx->Accum.ClearColor[1];
   const GLfloat b = ctx->Accum.ClearColor[2];
   const GLfloat a = ctx->Accum.ClearColor[3];
   GLfloat *accBuf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
   int i;

#if 1
   GLvoid *map;

   map = pipe_surface_map(acc_ps);
   switch (acc_strb->format) {
   case PIPE_FORMAT_R16G16B16A16_SNORM:
      {
         GLshort r = FLOAT_TO_SHORT(ctx->Accum.ClearColor[0]);
         GLshort g = FLOAT_TO_SHORT(ctx->Accum.ClearColor[1]);
         GLshort b = FLOAT_TO_SHORT(ctx->Accum.ClearColor[2]);
         GLshort a = FLOAT_TO_SHORT(ctx->Accum.ClearColor[3]);
         int i, j;
         for (i = 0; i < height; i++) {
            GLshort *dst = ((GLshort *) map
                            + ((ypos + i) * acc_ps->pitch + xpos) * 4);
            for (j = 0; j < width; j++) {
               dst[0] = r;
               dst[1] = g;
               dst[2] = b;
               dst[3] = a;
               dst += 4;
            }
         }
      }
      break;
   default:
      _mesa_problem(ctx, "unexpected format in st_clear_accum_buffer()");
   }

   pipe_surface_unmap(acc_ps);

#else
   for (i = 0; i < width * height; i++) {
      accBuf[i*4+0] = r;
      accBuf[i*4+1] = g;
      accBuf[i*4+2] = b;
      accBuf[i*4+3] = a;
   }

   acc_put_tile_rgba(pipe, acc_ps, xpos, ypos, width, height, accBuf);
#endif

void st_init_accum_functions

(

struct dd_function_table *

functions

)

Definition at line 315 of file acc2.c.

References st_Accum().

{
   functions->Accum = st_Accum;

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