add util for copying a texture
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f8f62312f9
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0bdb9a18fe
3 changed files with 41 additions and 1 deletions
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@ -1,6 +1,7 @@
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#ifndef DEMO_UTILS_H
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#define DEMO_UTILS_H 1
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#include <GL4D/gl4dh.h>
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#include <GL4D/gl4duw_SDL2.h>
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#include <SDL_image.h>
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#include <string.h>
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@ -32,4 +33,7 @@ void rotate_vec(GLfloat *, GLfloat);
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// Load an image into a GL texture
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void load_img(const char *filename, GLuint texture);
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// Copy a texture
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void copy_texture(GLuint, GLuint);
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#endif
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@ -37,7 +37,7 @@ static void init(void) {
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glGenTextures(2, _texId);
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load_img("images/wall.png", _texId[0]);
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load_img("images/wall.png", _texId[1]);
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copy_texture(_texId[0], _texId[1]);
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TTF_Font *font = NULL;
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if (initFont(&font, "fonts/Instrument.ttf", 100)) {
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36
src/utils.c
36
src/utils.c
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@ -50,3 +50,39 @@ void load_img(const char *filename, GLuint texture) {
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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void copy_texture(GLuint src, GLuint dst) {
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if (!(src || dst)) {
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fprintf(stderr,
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"Erreur copie texture: Source/Destination pas initalisée\n");
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exit(4);
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}
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glBindTexture(GL_TEXTURE_2D, src);
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GLint w, h;
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glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w);
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glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &h);
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SDL_Surface *s;
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if (!(s = SDL_CreateRGBSurface(0, w, h, 32, R_MASK, G_MASK, B_MASK,
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A_MASK))) {
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fprintf(stderr, "Erreur copie texture : %s\n", SDL_GetError());
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exit(4);
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}
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// Copie des données
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glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, s->pixels);
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// Copy data
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glBindTexture(GL_TEXTURE_2D, dst);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, s->w, s->h, 0, GL_RGBA,
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GL_UNSIGNED_BYTE, s->pixels);
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SDL_FreeSurface(s);
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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