103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
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#include "sdl_nyan.h"
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#include <SDL.h>
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#include <SDL_render.h>
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#include <array>
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#include <cassert>
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#include <cstdarg>
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#include <string>
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#include "log.h"
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#include "nyan_types.h"
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h"
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#include "nyan_data_r.c"
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static const char *const NYAN_PATH = "../external/nyan/nyan";
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static void nyan_sdl_fatal(const char *const msg)
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{
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log_fatal("%s: %s", msg, SDL_GetError());
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abort();
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}
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static void nyan_sdl_error(const char *const msg)
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{
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log_error("%s: %s", msg, SDL_GetError());
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}
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template<size_t Size>
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[[maybe_unused]] const char *aprintf(std::array<char, Size> &buf, const char *fmt, ...)
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{
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std::va_list args;
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va_start(args, fmt);
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std::vsnprintf(buf.data(), buf.size(), fmt, args);
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va_end(args);
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return buf.data();
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}
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static SDL_Texture *make_nyan_sprite_sheet_from_files(SDL_Renderer *renderer, const char dir = 'r')
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{
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static const auto textureRect = nyan_sheet_rect();
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auto result = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING,
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textureRect.w, textureRect.h);
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if (!result)
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nyan_sdl_fatal("make_nyan_sprite_sheet_from_files/SDL_CreateTexture");
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if (SDL_SetTextureBlendMode(result, SDL_BLENDMODE_BLEND))
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nyan_sdl_fatal("make_nyan_sprite_sheet_from_files/SDL_SetTextureBlendMode");
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std::array<char, 1024> strBuf;
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for (size_t i=0; i<NYAN_SPRITE_COUNT; ++i)
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{
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auto filename = aprintf(strBuf, "%s/%c%zu.png", NYAN_PATH, dir, i+1);
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log_trace("make_nyan_sprite_sheet_from_files: loading %s", filename);
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int w = 0, h = 0, bytes_per_pixel = 0;
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u8 *data = stbi_load(filename, &w, &h, &bytes_per_pixel, 0);
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assert(w == NYAN_SPRITE_WIDTH && h == NYAN_SPRITE_HEIGHT && bytes_per_pixel == NYAN_BBP);
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auto destRect = nyan_sprite_rect(i);
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if (SDL_UpdateTexture(result, &destRect, data, NYAN_BBP * NYAN_SPRITE_WIDTH))
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nyan_sdl_fatal("make_nyan_sprite_sheet_from_files/SDL_UpdateTexture");
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STBI_FREE(data);
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}
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return result;
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}
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SDL_Texture *make_nyan_sprite_sheet_from_mem(SDL_Renderer *renderer)
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{
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static const uint8_t *const data_ptrs[] = { r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, nullptr };
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static const size_t data_sizes[] = {
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sizeof(r1), sizeof(r2), sizeof(r3), sizeof(r4), sizeof(r5), sizeof(r6),
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sizeof(r7), sizeof(r8), sizeof(r9), sizeof(r10), sizeof(r11), sizeof(r12)
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};
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static const auto textureRect = nyan_sheet_rect();
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auto result = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING,
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textureRect.w, textureRect.h);
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if (!result)
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nyan_sdl_fatal("make_nyan_sprite_sheet_from_mem/SDL_CreateTexture");
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if (SDL_SetTextureBlendMode(result, SDL_BLENDMODE_BLEND))
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nyan_sdl_fatal("make_nyan_sprite_sheet_from_mem/SDL_SetTextureBlendMode");
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for (size_t i=0; data_ptrs[i]; ++i)
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{
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log_trace("make_nyan_sprite_sheet_from_mem: loading data %zu", i);
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int w = 0, h = 0, bytes_per_pixel = 0;
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u8 *data = stbi_load_from_memory(data_ptrs[i], data_sizes[i], &w, &h, &bytes_per_pixel, 0);
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assert(w == NYAN_SPRITE_WIDTH && h == NYAN_SPRITE_HEIGHT && bytes_per_pixel == NYAN_BBP);
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auto destRect = nyan_sprite_rect(i);
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if (SDL_UpdateTexture(result, &destRect, data, NYAN_BBP * NYAN_SPRITE_WIDTH))
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nyan_sdl_fatal("make_nyan_sprite_sheet_from_mem/SDL_UpdateTexture");
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STBI_FREE(data);
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}
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return result;
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}
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