static void clear_rgba_buffer	(	GLcontext *	ctx,
		struct gl_renderbuffer *	rb
	)		`[static]`

Clear an rgba color buffer without channel masking.

Definition at line 149 of file s_buffers.c.

Referenced by clear_color_buffers().

{
   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);
   }
}

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