1 files changed, 70 insertions, 0 deletions
diff --git a/in_practice/breakout/texture.c b/in_practice/breakout/texture.c
new file mode 100644
index 0000000..ac672f3
--- /dev/null
+++ b/in_practice/breakout/texture.c
@@ -0,0 +1,70 @@
+#include "texture.h"
+#include "sys.h"
+#include <string.h>
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
+gl_texture_t textures[MAX_TEXTURES] = {0};
+
+void generate_texture(gl_texture_t *texture, u32 width, u32 height, void *data)
+{
+	texture->width = width;
+	texture->height = height;
+	glGenTextures(1, &texture->id);
+	glBindTexture(GL_TEXTURE_2D, texture->id);
+	glTexImage2D(GL_TEXTURE_2D, 0, texture->internal_format, width, height, 0, texture->image_format, GL_UNSIGNED_BYTE, data);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, texture->wrap_s);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, texture->wrap_t);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, texture->min_filter);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, texture->mag_filter);
+	glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+gl_texture_t load_texture(const char *dir, const char *filename, const char *name, i32 alpha)
+{
+	gl_texture_t texture = {0};
+	if (get_texture_id(name)) {
+		info("texture with name \"%s\" already exist", name);
+		return texture;
+	}
+	texture = (gl_texture_t)DEFAULT_TEXTURE;
+	texture.name = name;
+	if (alpha) {
+		texture.internal_format = GL_RGBA;
+		texture.image_format = GL_RGBA;
+	}
+	char path[512] = {0};
+	snprintf(path, 512, "%s/%s", (dir ? dir : "."), filename);
+	i32 width, height;
+	u8 *data = stbi_load(path, &width, &height, 0, 0); 
+	if (!data) {
+		info("failed to load \"%s\"", path);
+		return texture;
+	}
+	generate_texture(&texture, width, height, data);
+	stbi_image_free(data);
+	for (u32 i = 0; i < MAX_TEXTURES; i++) {
+		if (!textures[i].name) {
+			textures[i] = texture;
+			info("texture \"%s\" loaded successfully", path);
+			return textures[i];
+		}
+	}
+	return texture;
+}
+
+u32 get_texture_id(const char *name)
+{
+	for (i32 i = 0; i < MAX_TEXTURES; i++)
+		if (textures[i].name && strstr(textures[i].name, name))
+			return textures[i].id;
+	return 0;
+}
+
+v2 get_texture_size(const char *name)
+{
+	for (i32 i = 0; i < MAX_TEXTURES; i++)
+		if (textures[i].name && strstr(textures[i].name, name))
+			return (v2){textures[i].width, textures[i].height};
+	return (v2){0.0f, 0.0f};
+}