70a9074415
-> render text image -> gylp_map -> stb_image_write.h und stb_rect_pack.h; git-svn-id: svn://ammerhai.com/home/mike/pokemon_repo@18 24008968-59e6-ed4c-a10b-0b2c954b24ab
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
#define STB_TRUETYPE_IMPLEMENTATION
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#define STB_IMAGE_WRITE_IMPLEMENTATION
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#define STB_RECT_PACK_IMPLEMENTATION
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#include "stb_rect_pack.h"
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#include "stb_truetype.h"
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#include "stb_image_write.h"
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#include "load_entire_file.h"
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#include "log.h"
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struct Glyph {
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int x_off;
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int y_off;
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char* data;
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};
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int main() {
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stbtt_fontinfo font_info;
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stbrp_context packer_context;
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stbrp_node packer_nodes[600];
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stbrp_rect packer_rects[100];
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Glyph glyphs[512];
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String font_file = load_entire_file("../assets/fonts/Lexend-Regular.ttf");
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if (!font_file.length) {
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log_error("Loading font file has failed.");
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return 1;
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}
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if (!stbtt_InitFont(&font_info, (unsigned char*)font_file.data, 0)) {
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log_error("Init Font has failed.");
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return 1;
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}
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float font_scale = stbtt_ScaleForPixelHeight(&font_info, 48);
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stbrp_init_target(&packer_context, 512, 512, packer_nodes, sizeof(packer_nodes) / sizeof(*packer_nodes));
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int rect_number = 0;
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for (int i = ' '; i <= '~'; i++) {
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int glyph_width;
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int glyph_height;
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int glyph_offset_x;
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int glyph_offset_y;
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glyphs[rect_number].data = (char*) stbtt_GetCodepointBitmap(&font_info, font_scale, font_scale, i, &glyph_width, &glyph_height, &glyph_offset_x, &glyph_offset_y);
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glyphs[rect_number].x_off = glyph_offset_x;
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glyphs[rect_number].y_off = glyph_offset_y;
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packer_rects[rect_number].id = i;
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packer_rects[rect_number].w = glyph_width;
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packer_rects[rect_number].h = glyph_height;
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rect_number++;
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}
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stbrp_pack_rects(&packer_context, packer_rects, rect_number);
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char* glyph_atlas = (char*) malloc(512 * 512);
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for (int x = 0; x < 512; x++) {
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for (int y = 0; y < 512; y++) {
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glyph_atlas[y * 512 + x] = 0;
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}
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}
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for (int i = 0; i < rect_number; i++) {
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for (int x = 0; x < packer_rects[i].w; x++) {
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for (int y = 0; y < packer_rects[i].h; y++) {
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glyph_atlas[(y + packer_rects[i].y) * 512 + x + packer_rects[i].x] = glyphs[i].data[y * packer_rects[i].w + x];
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}
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}
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}
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char file_name_test[256];
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sprintf(file_name_test, "../test_bild_text.bmp");
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stbi_write_bmp(file_name_test, 512, 512, 1, glyph_atlas);
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return 0;
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} |