window, texture, model, camera and gui (silly button)

1 files changed, 69 insertions, 0 deletions

diff --git a/prge_texture.c b/prge_texture.c
new file mode 100644
index 0000000..cce3374
--- /dev/null
+++ b/prge_texture.c
@@ -0,0 +1,69 @@
+Texture load_texture(Arena *arena, char *filename, B32 gamma_correction)
+{
+	U8		*data;
+
+	S32		nchannels;
+	GLenum		internal_format;
+	GLenum		data_format;
+
+	Texture		texture;
+
+	Arena		*temparena;
+
+	char		*cfilename;
+	Str8		str;
+
+	Assert(arena);
+
+	MemoryZeroStruct(&texture);
+
+	temparena = arena_alloc(0);
+
+	cfilename = str8tocstr(arena, filename);
+
+	stbi_set_flip_vertically_on_load(1);
+	data = stbi_load(cfilename, &texture.width, &texture.height, &nchannels, 0);
+
+	if (!data) {
+		str = str8pushf(temparena, "[ERROR] : Texture : %s : Failed to load\n", cfilename);
+		goto end;
+	}
+
+	switch (nchannels) {
+	case 1:
+		texture.type = TextureType_R;
+		internal_format = data_format = GL_RED;
+		break;
+	case 3:
+		texture.type = TextureType_RGB;
+		internal_format = (gamma_correction) ? GL_SRGB : GL_RGB;
+		data_format = GL_RGB;
+		break;
+	case 4:
+		texture.type = TextureType_RGBA;
+		internal_format = (gamma_correction) ? GL_SRGB_ALPHA : GL_RGBA;
+		data_format = GL_RGBA;
+		break;
+	default:
+		str = str8pushf(temparena, "[ERROR] : Texture : %s : Unsupported type\n", cfilename);
+		goto end;
+	}
+
+	glGenTextures(1, &texture.id);
+	glBindTexture(GL_TEXTURE_2D, texture.id);
+	glTexImage2D(GL_TEXTURE_2D, 0, internal_format, texture.width, texture.height, 0, data_format, GL_UNSIGNED_BYTE, data);
+	glGenerateMipmap(GL_TEXTURE_2D);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glBindTexture(GL_TEXTURE_2D, 0);
+
+	str = str8pushf(temparena, "[INFO] : Texture : %s : Loaded successfully\n", cfilename);
+
+end:
+	str8print(str);
+	stbi_image_free(data);
+	arena_release(temparena);
+	return texture;
+}