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-rw-r--r--src/graphics/font.c12
-rw-r--r--src/graphics/image.c67
-rw-r--r--src/graphics/text.c4
-rw-r--r--src/graphics/texture.c103
4 files changed, 115 insertions, 71 deletions
diff --git a/src/graphics/font.c b/src/graphics/font.c
index 20d9dfa..f55144a 100644
--- a/src/graphics/font.c
+++ b/src/graphics/font.c
@@ -10,14 +10,14 @@
/* TODO: Test and fix .tcc files */
-int mgl_font_load_from_file(mgl_font *self, const char *filepath, unsigned int font_size) {
+int mgl_font_load_from_file(mgl_font *self, const char *filepath, unsigned int character_size) {
self->texture.id = 0;
self->font_atlas.atlas = NULL;
self->font_atlas.width = 0;
self->font_atlas.height = 0;
- self->size = font_size;
+ self->character_size = character_size;
self->packed_chars = NULL;
self->num_packed_chars = 0;
@@ -47,8 +47,8 @@ int mgl_font_load_from_file(mgl_font *self, const char *filepath, unsigned int f
/* TODO: Optimize */
/* Find optimal size for atlas, starting from small to large */
for(int i = 0; i < 4; ++i) {
- self->font_atlas.width = (8 + (8 * i)) * self->size;
- self->font_atlas.height = (8 + (8 * i)) * self->size;
+ self->font_atlas.width = (8 + (8 * i)) * self->character_size;
+ self->font_atlas.height = (8 + (8 * i)) * self->character_size;
unsigned char *new_atlas = realloc(self->font_atlas.atlas, self->font_atlas.width * self->font_atlas.height);
if(!new_atlas) {
fprintf(stderr, "Error: failed to load font %s, error: out of memory\n", filepath);
@@ -67,7 +67,7 @@ int mgl_font_load_from_file(mgl_font *self, const char *filepath, unsigned int f
return -1;
}
- if(!stbtt_PackFontRange(&pc, filedata.data, 0, self->size, 0, self->num_packed_chars, self->packed_chars)) {
+ if(!stbtt_PackFontRange(&pc, filedata.data, 0, self->character_size, 0, self->num_packed_chars, self->packed_chars)) {
stbtt_PackEnd(&pc);
continue;
}
@@ -84,7 +84,7 @@ int mgl_font_load_from_file(mgl_font *self, const char *filepath, unsigned int f
return -1;
}
- if(mgl_texture_load_from_memory(&self->texture, self->font_atlas.atlas, self->font_atlas.width, self->font_atlas.height, MGL_TEXTURE_ALPHA, NULL) != 0) {
+ if(mgl_texture_load_from_memory(&self->texture, self->font_atlas.atlas, self->font_atlas.width, self->font_atlas.height, MGL_IMAGE_FORMAT_ALPHA, NULL) != 0) {
fprintf(stderr, "Error: failed to load font %s, error: mgl_texture_load_from_memory failed\n", filepath);
mgl_filedata_free(&filedata);
mgl_font_unload(self);
diff --git a/src/graphics/image.c b/src/graphics/image.c
new file mode 100644
index 0000000..430f03a
--- /dev/null
+++ b/src/graphics/image.c
@@ -0,0 +1,67 @@
+#include "../../include/mgl/graphics/image.h"
+
+#define STBI_NO_PSD
+#define STBI_NO_TGA
+#define STBI_NO_HDR
+#define STBI_NO_PIC
+#define STBI_NO_PNM
+#define STB_IMAGE_IMPLEMENTATION
+#include "../../external/stb_image.h"
+
+static mgl_image_format stbi_format_to_mgl_image_format(int stbi_format) {
+ switch(stbi_format) {
+ case STBI_grey:
+ return MGL_IMAGE_FORMAT_GRAY;
+ case STBI_grey_alpha:
+ return MGL_IMAGE_FORMAT_GRAY_ALPHA;
+ case STBI_rgb:
+ return MGL_IMAGE_FORMAT_RGB;
+ case STBI_rgb_alpha:
+ return MGL_IMAGE_FORMAT_RGBA;
+ }
+ return 0;
+}
+
+static size_t mgl_image_format_num_channels(mgl_image_format image_format) {
+ switch(image_format) {
+ case MGL_IMAGE_FORMAT_ALPHA: return 1;
+ case MGL_IMAGE_FORMAT_GRAY: return 1;
+ case MGL_IMAGE_FORMAT_GRAY_ALPHA: return 2;
+ case MGL_IMAGE_FORMAT_RGB: return 3;
+ case MGL_IMAGE_FORMAT_RGBA: return 4;
+ }
+ return 0;
+}
+
+/* TODO: Ensure texture is power of 2 if the hardware doesn't support non power of two textures */
+/* TODO: Verify if source format should always be 4 components (RGBA) because apparently if its another format then opengl will internally convert it to RGBA */
+int mgl_image_load_from_file(mgl_image *self, const char *filepath) {
+ self->data = NULL;
+ self->width = 0;
+ self->height = 0;
+
+ int format;
+ self->data = stbi_load(filepath, &self->width, &self->height, &format, 0);
+ if(!self->data) {
+ fprintf(stderr, "Error: failed to load image %s, error: %s\n", filepath, stbi_failure_reason());
+ mgl_image_unload(self);
+ return -1;
+ }
+ self->format = stbi_format_to_mgl_image_format(format);
+
+ return 0;
+}
+
+void mgl_image_unload(mgl_image *self) {
+ if(self->data) {
+ stbi_image_free(self->data);
+ self->data = NULL;
+ }
+ self->width = 0;
+ self->height = 0;
+ self->format = 0;
+}
+
+size_t mgl_image_get_size(mgl_image *self) {
+ return (size_t)self->width * (size_t)self->height * mgl_image_format_num_channels(self->format);
+}
diff --git a/src/graphics/text.c b/src/graphics/text.c
index 0aa33cf..7f90216 100644
--- a/src/graphics/text.c
+++ b/src/graphics/text.c
@@ -42,7 +42,7 @@ void mgl_text_draw(mgl_context *context, mgl_text *text) {
const char *str = text->text;
mgl_font_glyph glyph;
mgl_vec2f position = text->position;
- position.y += text->font->size;
+ position.y += text->font->character_size;
context->gl.glColor4ub(text->color.r, text->color.g, text->color.b, text->color.a);
context->gl.glBindTexture(GL_TEXTURE_2D, text->font->texture.id);
@@ -64,7 +64,7 @@ void mgl_text_draw(mgl_context *context, mgl_text *text) {
}
} else if(c == '\n') {
position.x = text->position.x;
- position.y += text->font->size;
+ position.y += text->font->character_size;
}
++str;
}
diff --git a/src/graphics/texture.c b/src/graphics/texture.c
index 4c7f68c..1427e6b 100644
--- a/src/graphics/texture.c
+++ b/src/graphics/texture.c
@@ -1,108 +1,85 @@
#include "../../include/mgl/graphics/texture.h"
+#include "../../include/mgl/graphics/image.h"
#include "../../include/mgl/mgl.h"
-
-#define STBI_NO_PSD
-#define STBI_NO_TGA
-#define STBI_NO_HDR
-#define STBI_NO_PIC
-#define STBI_NO_PNM
-#define STB_IMAGE_IMPLEMENTATION
-#include "../../external/stb_image.h"
+#include <stdio.h>
/* TODO: Check for glTexImage2D failure */
static int mgl_texture_format_to_opengl_format(mgl_texture_format format) {
switch(format) {
- case MGL_TEXTURE_ALPHA: return GL_ALPHA8;
- case MGL_TEXTURE_GRAY: return GL_LUMINANCE8;
- case MGL_TEXTURE_GRAY_ALPHA: return GL_LUMINANCE8_ALPHA8;
- case MGL_TEXTURE_RGB: return GL_RGB8;
- case MGL_TEXTURE_RGBA: return GL_RGBA8;
+ case MGL_TEXTURE_FORMAT_ALPHA: return GL_ALPHA8;
+ case MGL_TEXTURE_FORMAT_GRAY: return GL_LUMINANCE8;
+ case MGL_TEXTURE_FORMAT_GRAY_ALPHA: return GL_LUMINANCE8_ALPHA8;
+ case MGL_TEXTURE_FORMAT_RGB: return GL_RGB8;
+ case MGL_TEXTURE_FORMAT_RGBA: return GL_RGBA8;
}
return 0;
}
static int mgl_texture_format_to_compressed_opengl_format(mgl_texture_format format) {
switch(format) {
- case MGL_TEXTURE_ALPHA: return GL_ALPHA8;
- case MGL_TEXTURE_GRAY: return GL_LUMINANCE8;
- case MGL_TEXTURE_GRAY_ALPHA: return GL_LUMINANCE8_ALPHA8;
- case MGL_TEXTURE_RGB: return GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
- case MGL_TEXTURE_RGBA: return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
+ case MGL_TEXTURE_FORMAT_ALPHA: return GL_ALPHA8;
+ case MGL_TEXTURE_FORMAT_GRAY: return GL_LUMINANCE8;
+ case MGL_TEXTURE_FORMAT_GRAY_ALPHA: return GL_LUMINANCE8_ALPHA8;
+ case MGL_TEXTURE_FORMAT_RGB: return GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
+ case MGL_TEXTURE_FORMAT_RGBA: return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
}
return 0;
}
static int mgl_texture_format_to_source_opengl_format(mgl_texture_format format) {
switch(format) {
- case MGL_TEXTURE_ALPHA: return GL_ALPHA;
- case MGL_TEXTURE_GRAY: return GL_LUMINANCE8;
- case MGL_TEXTURE_GRAY_ALPHA: return GL_LUMINANCE8_ALPHA8;
- case MGL_TEXTURE_RGB: return GL_RGB;
- case MGL_TEXTURE_RGBA: return GL_RGBA;
+ case MGL_TEXTURE_FORMAT_ALPHA: return GL_ALPHA;
+ case MGL_TEXTURE_FORMAT_GRAY: return GL_LUMINANCE8;
+ case MGL_TEXTURE_FORMAT_GRAY_ALPHA: return GL_LUMINANCE8_ALPHA8;
+ case MGL_TEXTURE_FORMAT_RGB: return GL_RGB;
+ case MGL_TEXTURE_FORMAT_RGBA: return GL_RGBA;
}
return 0;
}
-static mgl_texture_format stbi_format_to_mgl_texture_format(int stbi_format) {
- switch(stbi_format) {
- case STBI_grey:
- return MGL_TEXTURE_GRAY;
- case STBI_grey_alpha:
- return MGL_TEXTURE_GRAY_ALPHA;
- case STBI_rgb:
- return MGL_TEXTURE_RGB;
- case STBI_rgb_alpha:
- return MGL_TEXTURE_RGBA;
+static mgl_texture_format mgl_image_format_to_mgl_texture_format(mgl_image_format image_format) {
+ switch(image_format) {
+ case MGL_IMAGE_FORMAT_ALPHA: return MGL_TEXTURE_FORMAT_ALPHA;
+ case MGL_IMAGE_FORMAT_GRAY: return MGL_TEXTURE_FORMAT_GRAY;
+ case MGL_IMAGE_FORMAT_GRAY_ALPHA: return MGL_TEXTURE_FORMAT_GRAY_ALPHA;
+ case MGL_IMAGE_FORMAT_RGB: return MGL_TEXTURE_FORMAT_RGB;
+ case MGL_IMAGE_FORMAT_RGBA: return MGL_TEXTURE_FORMAT_RGBA;
}
return 0;
}
-/* TODO: Ensure texture is power of 2 if the hardware doesn't support non power of two textures */
-/* TODO: Verify if source format should always be 4 components (RGBA) because apparently if its another format then opengl will internally convert it to RGBA */
int mgl_texture_load_from_file(mgl_texture *self, const char *filepath, mgl_texture_load_options *load_options) {
self->id = 0;
+ self->width = 0;
+ self->height = 0;
- int format;
- stbi_uc *image_data = stbi_load(filepath, &self->width, &self->height, &format, 0);
- if(!image_data) {
- fprintf(stderr, "Error: failed to load image %s, error: %s\n", filepath, stbi_failure_reason());
+ mgl_image image;
+ if(mgl_image_load_from_file(&image, filepath) != 0)
return -1;
- }
- self->format = stbi_format_to_mgl_texture_format(format);
-
- mgl_context *context = mgl_get_context();
- context->gl.glGenTextures(1, &self->id);
- if(self->id == 0) {
- fprintf(stderr, "Error: failed to load image %s", filepath);
- stbi_image_free(image_data);
- return -1;
- }
-
- const int opengl_texture_format = load_options && load_options->compressed ? mgl_texture_format_to_compressed_opengl_format(self->format) : mgl_texture_format_to_opengl_format(self->format);
- context->gl.glBindTexture(GL_TEXTURE_2D, self->id);
- context->gl.glTexImage2D(GL_TEXTURE_2D, 0, opengl_texture_format, self->width, self->height, 0, mgl_texture_format_to_source_opengl_format(self->format), GL_UNSIGNED_BYTE, image_data);
- context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- context->gl.glBindTexture(GL_TEXTURE_2D, 0);
+ int result = mgl_texture_load_from_image(self, &image, load_options);
+ mgl_image_unload(&image);
+ return result;
+}
- stbi_image_free(image_data);
- return 0;
+int mgl_texture_load_from_image(mgl_texture *self, mgl_image *image, mgl_texture_load_options *load_options) {
+ return mgl_texture_load_from_memory(self, image->data, image->width, image->height, image->format, load_options);
}
-int mgl_texture_load_from_memory(mgl_texture *self, const unsigned char *data, int width, int height, mgl_texture_format format, mgl_texture_load_options *load_options) {
+int mgl_texture_load_from_memory(mgl_texture *self, const unsigned char *data, int width, int height, mgl_image_format format, mgl_texture_load_options *load_options) {
self->id = 0;
self->width = width;
self->height = height;
- self->format = format;
+ self->format = mgl_image_format_to_mgl_texture_format(format);
mgl_context *context = mgl_get_context();
context->gl.glGenTextures(1, &self->id);
- if(self->id == 0)
+ if(self->id == 0) {
+ fprintf(stderr, "Error: failed to load image from memory (glGenTextures failed)\n");
+ mgl_texture_unload(self);
return -1;
+ }
const int opengl_texture_format = load_options && load_options->compressed ? mgl_texture_format_to_compressed_opengl_format(self->format) : mgl_texture_format_to_opengl_format(self->format);
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