diff options
Diffstat (limited to 'minui')
| -rw-r--r-- | minui/minui.h | 1 | ||||
| -rw-r--r-- | minui/resources.c | 182 |
2 files changed, 180 insertions, 3 deletions
diff --git a/minui/minui.h b/minui/minui.h index 573dd71..3250955 100644 --- a/minui/minui.h +++ b/minui/minui.h @@ -73,6 +73,7 @@ int ev_get_epollfd(void); // Returns 0 if no error, else negative. int res_create_surface(const char* name, gr_surface* pSurface); +int res_create_multi_surface(const char* name, int* frames, gr_surface** pSurface); int res_create_localized_surface(const char* name, gr_surface* pSurface); void res_free_surface(gr_surface surface); diff --git a/minui/resources.c b/minui/resources.c index b20c00a..91b01eb 100644 --- a/minui/resources.c +++ b/minui/resources.c @@ -189,6 +189,182 @@ exit: return result; } +int res_create_multi_surface(const char* name, int* frames, gr_surface** pSurface) { + char resPath[256]; + int result = 0; + unsigned char header[8]; + png_structp png_ptr = NULL; + png_infop info_ptr = NULL; + int i; + GGLSurface** surface = NULL; + + *pSurface = NULL; + *frames = -1; + + snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.png", name); + resPath[sizeof(resPath)-1] = '\0'; + FILE* fp = fopen(resPath, "rb"); + if (fp == NULL) { + result = -1; + goto exit; + } + + size_t bytesRead = fread(header, 1, sizeof(header), fp); + if (bytesRead != sizeof(header)) { + result = -2; + goto exit; + } + + if (png_sig_cmp(header, 0, sizeof(header))) { + result = -3; + goto exit; + } + + png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + if (!png_ptr) { + result = -4; + goto exit; + } + + info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) { + result = -5; + goto exit; + } + + if (setjmp(png_jmpbuf(png_ptr))) { + result = -6; + goto exit; + } + + png_init_io(png_ptr, fp); + png_set_sig_bytes(png_ptr, sizeof(header)); + png_read_info(png_ptr, info_ptr); + + int color_type, bit_depth; + png_uint_32 width, height; + png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, + &color_type, NULL, NULL, NULL); + + int channels = png_get_channels(png_ptr, info_ptr); + + if (!(bit_depth == 8 && + ((channels == 3 && color_type == PNG_COLOR_TYPE_RGB) || + (channels == 4 && color_type == PNG_COLOR_TYPE_RGBA) || + (channels == 1 && (color_type == PNG_COLOR_TYPE_PALETTE || + color_type == PNG_COLOR_TYPE_GRAY))))) { + return -7; + goto exit; + } + + *frames = 1; + png_textp text; + int num_text; + if (png_get_text(png_ptr, info_ptr, &text, &num_text)) { + for (i = 0; i < num_text; ++i) { + if (text[i].key && strcmp(text[i].key, "Frames") == 0 && text[i].text) { + *frames = atoi(text[i].text); + break; + } + } + printf(" found frames = %d\n", *frames); + } + + if (height % *frames != 0) { + printf("bad height (%d) for frame count (%d)\n", height, *frames); + result = -9; + goto exit; + } + + size_t stride = (color_type == PNG_COLOR_TYPE_GRAY ? 1 : 4) * width; + size_t pixelSize = stride * height / *frames; + + surface = malloc(*frames * sizeof(GGLSurface*)); + if (surface == NULL) { + result = -8; + goto exit; + } + for (i = 0; i < *frames; ++i) { + surface[i] = malloc(sizeof(GGLSurface) + pixelSize); + surface[i]->version = sizeof(GGLSurface); + surface[i]->width = width; + surface[i]->height = height / *frames; + surface[i]->stride = width; /* Yes, pixels, not bytes */ + surface[i]->data = (unsigned char*) (surface[i] + 1); + + if (channels == 3) { + surface[i]->format = GGL_PIXEL_FORMAT_RGBX_8888; + } else if (color_type == PNG_COLOR_TYPE_PALETTE) { + surface[i]->format = GGL_PIXEL_FORMAT_RGBA_8888; + } else if (channels == 1) { + surface[i]->format = GGL_PIXEL_FORMAT_L_8; + } else { + surface[i]->format = GGL_PIXEL_FORMAT_RGBA_8888; + } + } + + int alpha = (channels == 4); + if (color_type == PNG_COLOR_TYPE_PALETTE) { + png_set_palette_to_rgb(png_ptr); + } + if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) { + png_set_tRNS_to_alpha(png_ptr); + alpha = 1; + } + if (color_type == PNG_COLOR_TYPE_GRAY) { + alpha = 1; + } + + png_uint_32 y; + if (channels == 3 || (channels == 1 && !alpha)) { + for (y = 0; y < height; ++y) { + int fy = y / *frames; + int fr = y % *frames; + unsigned char* pRow = surface[fr]->data + fy * stride; + png_read_row(png_ptr, pRow, NULL); + + int x; + for(x = width - 1; x >= 0; x--) { + int sx = x * 3; + int dx = x * 4; + unsigned char r = pRow[sx]; + unsigned char g = pRow[sx + 1]; + unsigned char b = pRow[sx + 2]; + unsigned char a = 0xff; + pRow[dx ] = r; // r + pRow[dx + 1] = g; // g + pRow[dx + 2] = b; // b + pRow[dx + 3] = a; + } + } + } else { + for (y = 0; y < height; ++y) { + int fy = y / *frames; + int fr = y % *frames; + unsigned char* pRow = surface[fr]->data + fy * stride; + png_read_row(png_ptr, pRow, NULL); + } + } + + *pSurface = (gr_surface*) surface; + +exit: + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + + if (fp != NULL) { + fclose(fp); + } + if (result < 0) { + if (surface) { + for (i = 0; i < *frames; ++i) { + if (surface[i]) free(surface[i]); + } + free(surface); + } + } + return result; +} + static int matches_locale(const char* loc) { if (locale == NULL) return 0; @@ -257,7 +433,7 @@ int res_create_localized_surface(const char* name, gr_surface* pSurface) { png_read_info(png_ptr, info_ptr); int color_type, bit_depth; - size_t width, height; + png_uint_32 width, height; png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, NULL, NULL, NULL); int channels = png_get_channels(png_ptr, info_ptr); @@ -269,13 +445,13 @@ int res_create_localized_surface(const char* name, gr_surface* pSurface) { } unsigned char* row = malloc(width); - int y; + png_uint_32 y; for (y = 0; y < height; ++y) { png_read_row(png_ptr, row, NULL); int w = (row[1] << 8) | row[0]; int h = (row[3] << 8) | row[2]; int len = row[4]; - char* loc = row+5; + char* loc = (char*)row+5; if (y+1+h >= height || matches_locale(loc)) { printf(" %20s: %s (%d x %d @ %d)\n", name, loc, w, h, y); |