mirror of https://github.com/xemu-project/xemu.git
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/*
|
|
* Offscreen OpenGL abstraction layer - Common utilities
|
|
*
|
|
* Copyright (c) 2010 Intel
|
|
* Written by:
|
|
* Gordon Williams <gordon.williams@collabora.co.uk>
|
|
* Ian Molton <ian.molton@collabora.co.uk>
|
|
*
|
|
* 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
|
|
*/
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "gloffscreen.h"
|
|
|
|
|
|
void glo_readpixels(GLenum gl_format, GLenum gl_type,
|
|
unsigned int bytes_per_pixel, unsigned int stride,
|
|
unsigned int width, unsigned int height, bool vflip,
|
|
void *data)
|
|
{
|
|
/* TODO: weird strides */
|
|
assert(stride % bytes_per_pixel == 0);
|
|
|
|
/* Save guest processes GL state before we ReadPixels() */
|
|
int rl, pa;
|
|
glGetIntegerv(GL_PACK_ROW_LENGTH, &rl);
|
|
glGetIntegerv(GL_PACK_ALIGNMENT, &pa);
|
|
glPixelStorei(GL_PACK_ROW_LENGTH, stride / bytes_per_pixel);
|
|
glPixelStorei(GL_PACK_ALIGNMENT, 1);
|
|
|
|
glReadPixels(0, 0, width, height, gl_format, gl_type, data);
|
|
|
|
if (vflip) {
|
|
GLubyte *b = (GLubyte *) data;
|
|
GLubyte *c = &((GLubyte *) data)[stride * (height - 1)];
|
|
GLubyte *tmp = (GLubyte *) malloc(width * bytes_per_pixel);
|
|
for (int irow = 0; irow < height / 2; irow++) {
|
|
memcpy(tmp, b, width * bytes_per_pixel);
|
|
memcpy(b, c, width * bytes_per_pixel);
|
|
memcpy(c, tmp, width * bytes_per_pixel);
|
|
b += stride;
|
|
c -= stride;
|
|
}
|
|
free(tmp);
|
|
}
|
|
|
|
/* Restore GL state */
|
|
glPixelStorei(GL_PACK_ROW_LENGTH, rl);
|
|
glPixelStorei(GL_PACK_ALIGNMENT, pa);
|
|
}
|
|
|
|
bool glo_check_extension(const char* ext_name)
|
|
{
|
|
return epoxy_has_gl_extension(ext_name);
|
|
}
|