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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <png.h>
#include <pixelflinger/pixelflinger.h>
#include <linux/fb.h>
#include "minui.h"
struct fb_var_screeninfo vi;
GGLSurface gr_mem_surface;
int gr_save_screenshot(const char *dest)
{
uint32_t y, stride_bytes;
volatile int res = -1;
GGLContext *gl = NULL;
GGLSurface surface;
uint8_t * volatile img_data = NULL;
uint8_t *ptr;
FILE * volatile fp = NULL;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
fp = fopen(dest, "wb");
if(!fp)
goto exit;
img_data = malloc(gr_mem_surface.stride * vi.yres * 4);
surface.version = sizeof(surface);
surface.width = gr_mem_surface.width;
surface.height = gr_mem_surface.height;
surface.stride = gr_mem_surface.stride;
surface.data = img_data;
surface.format = GGL_PIXEL_FORMAT_RGBA_8888;
gglInit(&gl);
gl->colorBuffer(gl, &surface);
gl->activeTexture(gl, 0);
if(gr_mem_surface.format == GGL_PIXEL_FORMAT_RGBX_8888)
gl->disable(gl, GGL_BLEND);
gl->bindTexture(gl, &gr_mem_surface);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
gl->texCoord2i(gl, 0, 0);
gl->recti(gl, 0, 0, gr_mem_surface.width, gr_mem_surface.height);
gglUninit(gl);
gl = NULL;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
goto exit;
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL)
goto exit;
if (setjmp(png_jmpbuf(png_ptr)))
goto exit;
png_init_io(png_ptr, fp);
png_set_IHDR(png_ptr, info_ptr, surface.width, surface.height,
8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
png_write_info(png_ptr, info_ptr);
// To remove the alpha channel for PNG_COLOR_TYPE_RGB format,
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
ptr = img_data;
stride_bytes = surface.stride*4;
for(y = 0; y < surface.height; ++y)
{
png_write_row(png_ptr, ptr);
ptr += stride_bytes;
}
png_write_end(png_ptr, NULL);
res = 0;
exit:
if(info_ptr)
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
if(png_ptr)
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
if(gl)
gglUninit(gl);
if(img_data)
free(img_data);
if(fp)
fclose(fp);
return res;
}
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