mirror of
https://github.com/libretro/RetroArch.git
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325 lines
8.0 KiB
C
325 lines
8.0 KiB
C
/* Copyright (C) 2010-2016 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (image_texture.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stddef.h>
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#include <boolean.h>
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#include <formats/image.h>
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#include <file/nbio.h>
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enum video_image_format
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{
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IMAGE_FORMAT_NONE = 0,
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IMAGE_FORMAT_TGA,
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IMAGE_FORMAT_PNG,
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IMAGE_FORMAT_JPEG,
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IMAGE_FORMAT_BMP
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};
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static bool image_texture_supports_rgba = false;
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void image_texture_set_rgba(void)
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{
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image_texture_supports_rgba = true;
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}
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void image_texture_unset_rgba(void)
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{
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image_texture_supports_rgba = false;
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}
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bool image_texture_set_color_shifts(
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unsigned *r_shift, unsigned *g_shift, unsigned *b_shift,
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unsigned *a_shift)
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{
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*a_shift = 24;
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*r_shift = 16;
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*g_shift = 8;
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*b_shift = 0;
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if (image_texture_supports_rgba)
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{
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*r_shift = 0;
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*b_shift = 16;
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return true;
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}
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return false;
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}
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bool image_texture_color_convert(unsigned r_shift,
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unsigned g_shift, unsigned b_shift, unsigned a_shift,
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struct texture_image *out_img)
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{
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/* This is quite uncommon. */
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if (a_shift != 24 || r_shift != 16 || g_shift != 8 || b_shift != 0)
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{
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uint32_t i;
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uint32_t num_pixels = out_img->width * out_img->height;
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uint32_t *pixels = (uint32_t*)out_img->pixels;
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for (i = 0; i < num_pixels; i++)
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{
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uint32_t col = pixels[i];
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uint8_t a = (uint8_t)(col >> 24);
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uint8_t r = (uint8_t)(col >> 16);
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uint8_t g = (uint8_t)(col >> 8);
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uint8_t b = (uint8_t)(col >> 0);
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pixels[i] = (a << a_shift) |
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(r << r_shift) | (g << g_shift) | (b << b_shift);
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}
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return true;
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}
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return false;
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}
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#ifdef GEKKO
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#define GX_BLIT_LINE_32(off) \
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{ \
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unsigned x; \
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const uint16_t *tmp_src = src; \
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uint16_t *tmp_dst = dst; \
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for (x = 0; x < width2 >> 3; x++, tmp_src += 8, tmp_dst += 32) \
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{ \
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tmp_dst[ 0 + off] = tmp_src[0]; \
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tmp_dst[ 16 + off] = tmp_src[1]; \
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tmp_dst[ 1 + off] = tmp_src[2]; \
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tmp_dst[ 17 + off] = tmp_src[3]; \
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tmp_dst[ 2 + off] = tmp_src[4]; \
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tmp_dst[ 18 + off] = tmp_src[5]; \
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tmp_dst[ 3 + off] = tmp_src[6]; \
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tmp_dst[ 19 + off] = tmp_src[7]; \
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} \
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src += tmp_pitch; \
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}
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static bool image_texture_internal_gx_convert_texture32(
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struct texture_image *image)
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{
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unsigned tmp_pitch, width2, i;
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const uint16_t *src = NULL;
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uint16_t *dst = NULL;
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/* Memory allocation in libogc is extremely primitive so try
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* to avoid gaps in memory when converting by copying over to
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* a temporary buffer first, then converting over into
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* main buffer again. */
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void *tmp = malloc(image->width
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* image->height * sizeof(uint32_t));
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if (!tmp)
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return false;
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memcpy(tmp, image->pixels, image->width
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* image->height * sizeof(uint32_t));
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tmp_pitch = (image->width * sizeof(uint32_t)) >> 1;
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image->width &= ~3;
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image->height &= ~3;
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width2 = image->width << 1;
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src = (uint16_t*)tmp;
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dst = (uint16_t*)image->pixels;
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for (i = 0; i < image->height; i += 4, dst += 4 * width2)
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{
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GX_BLIT_LINE_32(0)
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GX_BLIT_LINE_32(4)
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GX_BLIT_LINE_32(8)
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GX_BLIT_LINE_32(12)
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}
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free(tmp);
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return true;
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}
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#endif
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static bool image_texture_load_internal(
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enum image_type_enum type,
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void *ptr,
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size_t len,
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struct texture_image *out_img,
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unsigned a_shift, unsigned r_shift,
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unsigned g_shift, unsigned b_shift)
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{
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int ret;
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bool success = false;
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void *img = image_transfer_new(type);
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if (!img)
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goto end;
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image_transfer_set_buffer_ptr(img, type, (uint8_t*)ptr);
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if (!image_transfer_start(img, type))
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goto end;
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while (image_transfer_iterate(img, type));
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if (!image_transfer_is_valid(img, type))
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goto end;
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do
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{
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ret = image_transfer_process(img, type,
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(uint32_t**)&out_img->pixels, len, &out_img->width,
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&out_img->height);
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}while(ret == IMAGE_PROCESS_NEXT);
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if (ret == IMAGE_PROCESS_ERROR || ret == IMAGE_PROCESS_ERROR_END)
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goto end;
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image_texture_color_convert(r_shift, g_shift, b_shift,
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a_shift, out_img);
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#ifdef GEKKO
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if (!image_texture_internal_gx_convert_texture32(out_img))
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{
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image_texture_free(out_img);
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goto end;
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}
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#endif
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success = true;
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end:
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if (img)
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image_transfer_free(img, type);
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return success;
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}
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void image_texture_free(struct texture_image *img)
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{
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if (!img)
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return;
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if (img->pixels)
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free(img->pixels);
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img->width = 0;
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img->height = 0;
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img->pixels = NULL;
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}
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static enum video_image_format image_texture_get_type(const char *path)
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{
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#ifdef HAVE_RTGA
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if (strstr(path, ".tga"))
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return IMAGE_FORMAT_TGA;
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#endif
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#ifdef HAVE_RPNG
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if (strstr(path, ".png"))
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return IMAGE_FORMAT_PNG;
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#endif
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#ifdef HAVE_RJPEG
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if (strstr(path, ".jpg") || strstr(path, ".jpeg"))
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return IMAGE_FORMAT_JPEG;
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#endif
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#ifdef HAVE_RBMP
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if (strstr(path, ".bmp"))
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return IMAGE_FORMAT_BMP;
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#endif
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return IMAGE_FORMAT_NONE;
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}
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static enum image_type_enum image_texture_convert_fmt_to_type(enum video_image_format fmt)
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{
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switch (fmt)
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{
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#ifdef HAVE_RPNG
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case IMAGE_FORMAT_PNG:
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return IMAGE_TYPE_PNG;
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#endif
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#ifdef HAVE_RJPEG
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case IMAGE_FORMAT_JPEG:
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return IMAGE_TYPE_JPEG;
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#endif
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#ifdef HAVE_RBMP
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case IMAGE_FORMAT_BMP:
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return IMAGE_TYPE_BMP;
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#endif
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#ifdef HAVE_RTGA
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case IMAGE_FORMAT_TGA:
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return IMAGE_TYPE_TGA;
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#endif
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case IMAGE_FORMAT_NONE:
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default:
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break;
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}
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return IMAGE_TYPE_NONE;
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}
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bool image_texture_load(struct texture_image *out_img,
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const char *path)
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{
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unsigned r_shift, g_shift, b_shift, a_shift;
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size_t file_len = 0;
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struct nbio_t *handle = NULL;
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void *ptr = NULL;
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enum video_image_format fmt = image_texture_get_type(path);
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image_texture_set_color_shifts(&r_shift, &g_shift, &b_shift,
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&a_shift);
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if (fmt != IMAGE_FORMAT_NONE)
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{
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handle = (struct nbio_t*)nbio_open(path, NBIO_READ);
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if (!handle)
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goto error;
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nbio_begin_read(handle);
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while (!nbio_iterate(handle));
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ptr = nbio_get_ptr(handle, &file_len);
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if (!ptr)
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goto error;
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if (image_texture_load_internal(
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image_texture_convert_fmt_to_type(fmt),
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ptr, file_len, out_img,
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a_shift, r_shift, g_shift, b_shift))
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goto success;
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}
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error:
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out_img->pixels = NULL;
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out_img->width = 0;
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out_img->height = 0;
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if (handle)
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nbio_free(handle);
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return false;
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success:
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if (handle)
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nbio_free(handle);
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return true;
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}
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