Beispiel #1
0
/**
 * Clear the color buffer when glColorMask is in effect.
 */
static void
clear_rgba_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb)
{
   const GLint x = ctx->DrawBuffer->_Xmin;
   const GLint y = ctx->DrawBuffer->_Ymin;
   const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
   const GLint width  = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
   SWspan span;
   GLint i;

   ASSERT(ctx->Visual.rgbMode);
   ASSERT(rb->PutRow);

   /* Initialize color span with clear color */
   /* XXX optimize for clearcolor == black/zero (bzero) */
   INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_RGBA);
   span.array->ChanType = rb->DataType;
   if (span.array->ChanType == GL_UNSIGNED_BYTE) {
      GLubyte clearColor[4];
      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[RCOMP], ctx->Color.ClearColor[0]);
      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[GCOMP], ctx->Color.ClearColor[1]);
      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[BCOMP], ctx->Color.ClearColor[2]);
      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[ACOMP], ctx->Color.ClearColor[3]);
      for (i = 0; i < width; i++) {
         COPY_4UBV(span.array->rgba[i], clearColor);
      }
   }
   else if (span.array->ChanType == GL_UNSIGNED_SHORT) {
      GLushort clearColor[4];
      UNCLAMPED_FLOAT_TO_USHORT(clearColor[RCOMP], ctx->Color.ClearColor[0]);
      UNCLAMPED_FLOAT_TO_USHORT(clearColor[GCOMP], ctx->Color.ClearColor[1]);
      UNCLAMPED_FLOAT_TO_USHORT(clearColor[BCOMP], ctx->Color.ClearColor[2]);
      UNCLAMPED_FLOAT_TO_USHORT(clearColor[ACOMP], ctx->Color.ClearColor[3]);
      for (i = 0; i < width; i++) {
         COPY_4V(span.array->rgba[i], clearColor);
      }
   }
   else {
      ASSERT(span.array->ChanType == GL_FLOAT);
      for (i = 0; i < width; i++) {
         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][0], ctx->Color.ClearColor[0]);
         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][1], ctx->Color.ClearColor[1]);
         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][2], ctx->Color.ClearColor[2]);
         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][3], ctx->Color.ClearColor[3]);
      }
   }

   /* Note that masking will change the color values, but only the
    * channels for which the write mask is GL_FALSE.  The channels
    * which which are write-enabled won't get modified.
    */
   for (i = 0; i < height; i++) {
      span.x = x;
      span.y = y + i;
      _swrast_mask_rgba_span(ctx, rb, &span);
      /* write masked row */
      rb->PutRow(ctx, rb, width, x, y + i, span.array->rgba, NULL);
   }
}
Beispiel #2
0
/**
 * Clear an rgba color buffer without channel masking.
 */
static void
clear_rgba_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
{
   const GLint x = ctx->DrawBuffer->_Xmin;
   const GLint y = ctx->DrawBuffer->_Ymin;
   const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
   const GLint width  = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
   GLubyte clear8[4];
   GLushort clear16[4];
   GLvoid *clearVal;
   GLint i;

   ASSERT(ctx->Visual.rgbMode);

   ASSERT(ctx->Color.ColorMask[0] &&
          ctx->Color.ColorMask[1] &&
          ctx->Color.ColorMask[2] &&
          ctx->Color.ColorMask[3]);             

   ASSERT(rb->PutMonoRow);

   switch (rb->DataType) {
      case GL_UNSIGNED_BYTE:
         UNCLAMPED_FLOAT_TO_UBYTE(clear8[0], ctx->Color.ClearColor[0]);
         UNCLAMPED_FLOAT_TO_UBYTE(clear8[1], ctx->Color.ClearColor[1]);
         UNCLAMPED_FLOAT_TO_UBYTE(clear8[2], ctx->Color.ClearColor[2]);
         UNCLAMPED_FLOAT_TO_UBYTE(clear8[3], ctx->Color.ClearColor[3]);
         clearVal = clear8;
         break;
      case GL_UNSIGNED_SHORT:
         UNCLAMPED_FLOAT_TO_USHORT(clear16[0], ctx->Color.ClearColor[0]);
         UNCLAMPED_FLOAT_TO_USHORT(clear16[1], ctx->Color.ClearColor[1]);
         UNCLAMPED_FLOAT_TO_USHORT(clear16[2], ctx->Color.ClearColor[2]);
         UNCLAMPED_FLOAT_TO_USHORT(clear16[3], ctx->Color.ClearColor[3]);
         clearVal = clear16;
         break;
      case GL_FLOAT:
         clearVal = ctx->Color.ClearColor;
         break;
      default:
         _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer");
         return;
   }

   for (i = 0; i < height; i++) {
      rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
   }
}
Beispiel #3
0
/**
 * Upload SAMPLER_BORDER_COLOR_STATE.
 */
void
upload_default_color(struct brw_context *brw, struct gl_sampler_object *sampler,
		     int unit, int ss_index)
{
   struct intel_context *intel = &brw->intel;
   struct gl_context *ctx = &intel->ctx;
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   struct gl_texture_object *texObj = texUnit->_Current;
   struct gl_texture_image *firstImage = texObj->Image[0][texObj->BaseLevel];
   float color[4];

   if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
      /* GL specs that border color for depth textures is taken from the
       * R channel, while the hardware uses A.  Spam R into all the
       * channels for safety.
       */
      color[0] = sampler->BorderColor.f[0];
      color[1] = sampler->BorderColor.f[0];
      color[2] = sampler->BorderColor.f[0];
      color[3] = sampler->BorderColor.f[0];
   } else {
      color[0] = sampler->BorderColor.f[0];
      color[1] = sampler->BorderColor.f[1];
      color[2] = sampler->BorderColor.f[2];
      color[3] = sampler->BorderColor.f[3];
   }

   /* In some cases we use an RGBA surface format for GL RGB textures,
    * where we've initialized the A channel to 1.0.  We also have to set
    * the border color alpha to 1.0 in that case.
    */
   if (firstImage->_BaseFormat == GL_RGB)
      color[3] = 1.0;

   if (intel->gen == 5 || intel->gen == 6) {
      struct gen5_sampler_default_color *sdc;

      sdc = brw_state_batch(brw, AUB_TRACE_SAMPLER_DEFAULT_COLOR,
			    sizeof(*sdc), 32, &brw->wm.sdc_offset[ss_index]);

      memset(sdc, 0, sizeof(*sdc));

      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[0], color[0]);
      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[1], color[1]);
      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[2], color[2]);
      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[3], color[3]);

      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[0], color[0]);
      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[1], color[1]);
      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[2], color[2]);
      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[3], color[3]);

      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[0], color[0]);
      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[1], color[1]);
      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[2], color[2]);
      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[3], color[3]);

      sdc->hf[0] = _mesa_float_to_half(color[0]);
      sdc->hf[1] = _mesa_float_to_half(color[1]);
      sdc->hf[2] = _mesa_float_to_half(color[2]);
      sdc->hf[3] = _mesa_float_to_half(color[3]);

      sdc->b[0] = sdc->s[0] >> 8;
      sdc->b[1] = sdc->s[1] >> 8;
      sdc->b[2] = sdc->s[2] >> 8;
      sdc->b[3] = sdc->s[3] >> 8;

      sdc->f[0] = color[0];
      sdc->f[1] = color[1];
      sdc->f[2] = color[2];
      sdc->f[3] = color[3];
   } else {
/**
 * Upload SAMPLER_BORDER_COLOR_STATE.
 */
void
upload_default_color(struct brw_context *brw,
                     struct gl_sampler_object *sampler,
                     int unit,
                     uint32_t *sdc_offset)
{
   struct gl_context *ctx = &brw->ctx;
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   struct gl_texture_object *texObj = texUnit->_Current;
   struct gl_texture_image *firstImage = texObj->Image[0][texObj->BaseLevel];
   float color[4];

   switch (firstImage->_BaseFormat) {
   case GL_DEPTH_COMPONENT:
      /* GL specs that border color for depth textures is taken from the
       * R channel, while the hardware uses A.  Spam R into all the
       * channels for safety.
       */
      color[0] = sampler->BorderColor.f[0];
      color[1] = sampler->BorderColor.f[0];
      color[2] = sampler->BorderColor.f[0];
      color[3] = sampler->BorderColor.f[0];
      break;
   case GL_ALPHA:
      color[0] = 0.0;
      color[1] = 0.0;
      color[2] = 0.0;
      color[3] = sampler->BorderColor.f[3];
      break;
   case GL_INTENSITY:
      color[0] = sampler->BorderColor.f[0];
      color[1] = sampler->BorderColor.f[0];
      color[2] = sampler->BorderColor.f[0];
      color[3] = sampler->BorderColor.f[0];
      break;
   case GL_LUMINANCE:
      color[0] = sampler->BorderColor.f[0];
      color[1] = sampler->BorderColor.f[0];
      color[2] = sampler->BorderColor.f[0];
      color[3] = 1.0;
      break;
   case GL_LUMINANCE_ALPHA:
      color[0] = sampler->BorderColor.f[0];
      color[1] = sampler->BorderColor.f[0];
      color[2] = sampler->BorderColor.f[0];
      color[3] = sampler->BorderColor.f[3];
      break;
   default:
      color[0] = sampler->BorderColor.f[0];
      color[1] = sampler->BorderColor.f[1];
      color[2] = sampler->BorderColor.f[2];
      color[3] = sampler->BorderColor.f[3];
      break;
   }

   /* In some cases we use an RGBA surface format for GL RGB textures,
    * where we've initialized the A channel to 1.0.  We also have to set
    * the border color alpha to 1.0 in that case.
    */
   if (firstImage->_BaseFormat == GL_RGB)
      color[3] = 1.0;

   if (brw->gen >= 8) {
      /* On Broadwell, the border color is represented as four 32-bit floats,
       * integers, or unsigned values, interpreted according to the surface
       * format.  This matches the sampler->BorderColor union exactly.  Since
       * we use floats both here and in the above reswizzling code, we preserve
       * the original bit pattern.  So we actually handle all three formats.
       */
      float *sdc = brw_state_batch(brw, AUB_TRACE_SAMPLER_DEFAULT_COLOR,
                                   4 * 4, 64, sdc_offset);
      COPY_4FV(sdc, color);
   } else if (brw->gen == 5 || brw->gen == 6) {
      struct gen5_sampler_default_color *sdc;

      sdc = brw_state_batch(brw, AUB_TRACE_SAMPLER_DEFAULT_COLOR,
			    sizeof(*sdc), 32, sdc_offset);

      memset(sdc, 0, sizeof(*sdc));

      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[0], color[0]);
      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[1], color[1]);
      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[2], color[2]);
      UNCLAMPED_FLOAT_TO_UBYTE(sdc->ub[3], color[3]);

      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[0], color[0]);
      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[1], color[1]);
      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[2], color[2]);
      UNCLAMPED_FLOAT_TO_USHORT(sdc->us[3], color[3]);

      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[0], color[0]);
      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[1], color[1]);
      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[2], color[2]);
      UNCLAMPED_FLOAT_TO_SHORT(sdc->s[3], color[3]);

      sdc->hf[0] = _mesa_float_to_half(color[0]);
      sdc->hf[1] = _mesa_float_to_half(color[1]);
      sdc->hf[2] = _mesa_float_to_half(color[2]);
      sdc->hf[3] = _mesa_float_to_half(color[3]);

      sdc->b[0] = sdc->s[0] >> 8;
      sdc->b[1] = sdc->s[1] >> 8;
      sdc->b[2] = sdc->s[2] >> 8;
      sdc->b[3] = sdc->s[3] >> 8;

      sdc->f[0] = color[0];
      sdc->f[1] = color[1];
      sdc->f[2] = color[2];
      sdc->f[3] = color[3];
   } else {