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RetroArch/libretro-common/formats/image_texture.c

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/* Copyright (C) 2010-2016 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (image_texture.c).
* ---------------------------------------------------------------------------------------
*
* 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 <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <boolean.h>
#include <formats/image.h>
#include <file/nbio.h>
enum video_image_format
{
IMAGE_FORMAT_NONE = 0,
IMAGE_FORMAT_TGA,
IMAGE_FORMAT_PNG,
IMAGE_FORMAT_JPEG,
IMAGE_FORMAT_BMP
};
static bool image_texture_supports_rgba = false;
void image_texture_set_rgba(void)
{
image_texture_supports_rgba = true;
}
void image_texture_unset_rgba(void)
{
image_texture_supports_rgba = false;
}
bool image_texture_set_color_shifts(
unsigned *r_shift, unsigned *g_shift, unsigned *b_shift,
unsigned *a_shift)
{
*a_shift = 24;
*r_shift = 16;
*g_shift = 8;
*b_shift = 0;
if (image_texture_supports_rgba)
{
*r_shift = 0;
*b_shift = 16;
return true;
}
return false;
}
bool image_texture_color_convert(unsigned r_shift,
unsigned g_shift, unsigned b_shift, unsigned a_shift,
struct texture_image *out_img)
{
/* This is quite uncommon. */
if (a_shift != 24 || r_shift != 16 || g_shift != 8 || b_shift != 0)
{
uint32_t i;
uint32_t num_pixels = out_img->width * out_img->height;
uint32_t *pixels = (uint32_t*)out_img->pixels;
for (i = 0; i < num_pixels; i++)
{
uint32_t col = pixels[i];
uint8_t a = (uint8_t)(col >> 24);
uint8_t r = (uint8_t)(col >> 16);
uint8_t g = (uint8_t)(col >> 8);
uint8_t b = (uint8_t)(col >> 0);
pixels[i] = (a << a_shift) |
(r << r_shift) | (g << g_shift) | (b << b_shift);
}
return true;
}
return false;
}
#ifdef GEKKO
#define GX_BLIT_LINE_32(off) \
{ \
unsigned x; \
const uint16_t *tmp_src = src; \
uint16_t *tmp_dst = dst; \
for (x = 0; x < width2 >> 3; x++, tmp_src += 8, tmp_dst += 32) \
{ \
tmp_dst[ 0 + off] = tmp_src[0]; \
tmp_dst[ 16 + off] = tmp_src[1]; \
tmp_dst[ 1 + off] = tmp_src[2]; \
tmp_dst[ 17 + off] = tmp_src[3]; \
tmp_dst[ 2 + off] = tmp_src[4]; \
tmp_dst[ 18 + off] = tmp_src[5]; \
tmp_dst[ 3 + off] = tmp_src[6]; \
tmp_dst[ 19 + off] = tmp_src[7]; \
} \
src += tmp_pitch; \
}
static bool image_texture_internal_gx_convert_texture32(
struct texture_image *image)
{
unsigned tmp_pitch, width2, i;
const uint16_t *src = NULL;
uint16_t *dst = NULL;
/* Memory allocation in libogc is extremely primitive so try
* to avoid gaps in memory when converting by copying over to
* a temporary buffer first, then converting over into
* main buffer again. */
void *tmp = malloc(image->width
* image->height * sizeof(uint32_t));
if (!tmp)
return false;
memcpy(tmp, image->pixels, image->width
* image->height * sizeof(uint32_t));
tmp_pitch = (image->width * sizeof(uint32_t)) >> 1;
image->width &= ~3;
image->height &= ~3;
width2 = image->width << 1;
src = (uint16_t*)tmp;
dst = (uint16_t*)image->pixels;
for (i = 0; i < image->height; i += 4, dst += 4 * width2)
{
GX_BLIT_LINE_32(0)
GX_BLIT_LINE_32(4)
GX_BLIT_LINE_32(8)
GX_BLIT_LINE_32(12)
}
free(tmp);
return true;
}
#endif
static bool image_texture_load_internal(
enum image_type_enum type,
void *ptr,
size_t len,
struct texture_image *out_img,
unsigned a_shift, unsigned r_shift,
unsigned g_shift, unsigned b_shift)
{
int ret;
bool success = false;
void *img = image_transfer_new(type);
if (!img)
goto end;
image_transfer_set_buffer_ptr(img, type, (uint8_t*)ptr);
if (!image_transfer_start(img, type))
goto end;
while (image_transfer_iterate(img, type));
if (!image_transfer_is_valid(img, type))
goto end;
do
{
ret = image_transfer_process(img, type,
(uint32_t**)&out_img->pixels, len, &out_img->width,
&out_img->height);
}while(ret == IMAGE_PROCESS_NEXT);
if (ret == IMAGE_PROCESS_ERROR || ret == IMAGE_PROCESS_ERROR_END)
goto end;
image_texture_color_convert(r_shift, g_shift, b_shift,
a_shift, out_img);
#ifdef GEKKO
if (!image_texture_internal_gx_convert_texture32(out_img))
{
image_texture_free(out_img);
goto end;
}
#endif
success = true;
end:
if (img)
image_transfer_free(img, type);
return success;
}
void image_texture_free(struct texture_image *img)
{
if (!img)
return;
if (img->pixels)
free(img->pixels);
memset(img, 0, sizeof(*img));
}
static enum video_image_format image_texture_get_type(const char *path)
{
#ifdef HAVE_RTGA
if (strstr(path, ".tga"))
return IMAGE_FORMAT_TGA;
#endif
#ifdef HAVE_RPNG
if (strstr(path, ".png"))
return IMAGE_FORMAT_PNG;
#endif
#ifdef HAVE_RJPEG
if (strstr(path, ".jpg") || strstr(path, ".jpeg"))
return IMAGE_FORMAT_JPEG;
#endif
#ifdef HAVE_RBMP
if (strstr(path, ".bmp"))
return IMAGE_FORMAT_BMP;
#endif
return IMAGE_FORMAT_NONE;
}
static enum image_type_enum image_texture_convert_fmt_to_type(enum video_image_format fmt)
{
switch (fmt)
{
#ifdef HAVE_RPNG
case IMAGE_FORMAT_PNG:
return IMAGE_TYPE_PNG;
#endif
#ifdef HAVE_RJPEG
case IMAGE_FORMAT_JPEG:
return IMAGE_TYPE_JPEG;
#endif
#ifdef HAVE_RBMP
case IMAGE_FORMAT_BMP:
return IMAGE_TYPE_BMP;
#endif
#ifdef HAVE_RTGA
case IMAGE_FORMAT_TGA:
return IMAGE_TYPE_TGA;
#endif
case IMAGE_FORMAT_NONE:
default:
break;
}
return IMAGE_TYPE_NONE;
}
bool image_texture_load(struct texture_image *out_img,
const char *path)
{
unsigned r_shift, g_shift, b_shift, a_shift;
size_t file_len = 0;
struct nbio_t *handle = NULL;
void *ptr = NULL;
enum video_image_format fmt = image_texture_get_type(path);
image_texture_set_color_shifts(&r_shift, &g_shift, &b_shift,
&a_shift);
if (fmt != IMAGE_FORMAT_NONE)
{
handle = (struct nbio_t*)nbio_open(path, NBIO_READ);
if (!handle)
goto error;
nbio_begin_read(handle);
while (!nbio_iterate(handle));
ptr = nbio_get_ptr(handle, &file_len);
if (!ptr)
goto error;
if (image_texture_load_internal(
image_texture_convert_fmt_to_type(fmt),
ptr, file_len, out_img,
a_shift, r_shift, g_shift, b_shift))
goto success;
}
error:
out_img->pixels = NULL;
out_img->width = 0;
out_img->height = 0;
if (handle)
nbio_free(handle);
return false;
success:
if (handle)
nbio_free(handle);
return true;
}
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