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/**************************************************************************
*
* Copyright 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* Surface utility functions.
*
* @author Brian Paul
*/
#include "pipe/p_screen.h"
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "util/u_format.h"
#include "util/u_surface.h"
/**
* Helper to quickly create an RGBA rendering surface of a certain size.
* \param textureOut returns the new texture
* \param surfaceOut returns the new surface
* \return TRUE for success, FALSE if failure
*/
boolean
util_create_rgba_surface(struct pipe_screen *screen,
uint width, uint height,
struct pipe_texture **textureOut,
struct pipe_surface **surfaceOut)
{
static const enum pipe_format rgbaFormats[] = {
PIPE_FORMAT_A8R8G8B8_UNORM,
PIPE_FORMAT_B8G8R8A8_UNORM,
PIPE_FORMAT_R8G8B8A8_UNORM,
PIPE_FORMAT_NONE
};
const uint target = PIPE_TEXTURE_2D;
const uint usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
enum pipe_format format = PIPE_FORMAT_NONE;
struct pipe_texture templ;
uint i;
/* Choose surface format */
for (i = 0; rgbaFormats[i]; i++) {
if (screen->is_format_supported(screen, rgbaFormats[i],
target, usage, 0)) {
format = rgbaFormats[i];
break;
}
}
if (format == PIPE_FORMAT_NONE)
return FALSE; /* unable to get an rgba format!?! */
/* create texture */
memset(&templ, 0, sizeof(templ));
templ.target = target;
templ.format = format;
templ.last_level = 0;
templ.width0 = width;
templ.height0 = height;
templ.depth0 = 1;
util_format_get_block(format, &templ.block);
templ.tex_usage = usage;
*textureOut = screen->texture_create(screen, &templ);
if (!*textureOut)
return FALSE;
/* create surface / view into texture */
*surfaceOut = screen->get_tex_surface(screen, *textureOut, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE);
if (!*surfaceOut) {
pipe_texture_reference(textureOut, NULL);
return FALSE;
}
return TRUE;
}
/**
* Release the surface and texture from util_create_rgba_surface().
*/
void
util_destroy_rgba_surface(struct pipe_texture *texture,
struct pipe_surface *surface)
{
pipe_surface_reference(&surface, NULL);
pipe_texture_reference(&texture, NULL);
}
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