render batching for coloured rectangles

3 files changed, 97 insertions, 28 deletions

diff --git a/include/rodeo.h b/include/rodeo.h
index 86505f1..4686cb5 100644
--- a/include/rodeo.h
+++ b/include/rodeo.h
@@ -1,40 +1,23 @@
 #include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+
 #include "SDL2/SDL.h"
 #include "SDL2/SDL_syswm.h"
+#include "bgfx/c99/bgfx.h"
 
-typedef
-struct
-Rodeo__\
-data_t
-{
-	SDL_Window* window;
-	SDL_Surface* screen_surface;
-	SDL_SysWMinfo wmi;
-	int screen_width;
-	int screen_height;
-	SDL_Event sdl_event;
-	bool quit;
-} Rodeo__data_t;
+#include "rodeo_types.h"
 
-typedef
-struct
-Rodeo__\
-color_t
-{
-	float red;
-	float green;
-	float blue;
-	float alpha;
-} Rodeo__color_t;
 
 void
 Rodeo__\
 init_window(
-		Rodeo__data_t* state,
-		int screen_height,
-		int screen_width,
-		char* title
-		);
+	Rodeo__data_t* state,
+	int screen_height,
+	int screen_width,
+	char* title
+);
 
 void
 Rodeo__\
@@ -56,3 +39,25 @@ void
 Rodeo__\
 draw_debug_text(u_int16_t x, u_int16_t y, const char *format, ...);
 
+const char *
+Rodeo__\
+get_renderer_name_as_string();
+
+void
+Rodeo__\
+flush_batch(Rodeo__data_t *state);
+
+void
+Rodeo__\
+draw_rectangle(
+	Rodeo__data_t *state,
+	u_int16_t x,
+	u_int16_t y,
+	u_int16_t width,
+	u_int16_t height,
+	struct Rodeo__color_rgba_t color
+);
+
+bgfx_shader_handle_t
+Rodeo__\
+load_shader(const char* path);
diff --git a/include/rodeo_math.h b/include/rodeo_math.h
new file mode 100644
index 0000000..13db9b3
--- /dev/null
+++ b/include/rodeo_math.h
@@ -0,0 +1,7 @@
+#include "stdint.h"
+#include "rodeo_types.h"
+
+uint32_t
+Rodeo__\
+Math__\
+color_rgba_to_uint32(const struct Rodeo__color_rgba_t color);
diff --git a/include/rodeo_types.h b/include/rodeo_types.h
new file mode 100644
index 0000000..08748e5
--- /dev/null
+++ b/include/rodeo_types.h
@@ -0,0 +1,57 @@
+#pragma once
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "SDL2/SDL.h"
+#include "SDL2/SDL_syswm.h"
+#include "bgfx/c99/bgfx.h"
+
+#define RODEO__MAX_VERTEX_SIZE 8192
+
+typedef
+struct
+Rodeo__\
+color_rgba_t
+{
+	float red;
+	float green;
+	float blue;
+	float alpha;
+} Rodeo__color_t;
+
+typedef
+struct
+Rodeo__\
+position_color_vertex_t
+{
+	float x;
+	float y;
+	float z;
+	uint32_t abgr;
+} Rodeo__position_color_vertex_t;
+
+typedef
+struct
+Rodeo__\
+data_t
+{
+	SDL_Window* window;
+	SDL_Surface* screen_surface;
+	SDL_SysWMinfo wmi;
+	int screen_width;
+	int screen_height;
+	SDL_Event sdl_event;
+	bool quit;
+
+	bgfx_vertex_layout_t vertex_layout;
+	bgfx_dynamic_vertex_buffer_handle_t vertex_buffer_handle;
+	bgfx_dynamic_index_buffer_handle_t index_buffer_handle;
+	uint16_t vertex_size;
+	Rodeo__position_color_vertex_t batched_vertices[RODEO__MAX_VERTEX_SIZE];
+	uint16_t index_count;
+	uint16_t index_size;
+	uint16_t batched_indices[(RODEO__MAX_VERTEX_SIZE / 4) * 6];
+	bgfx_shader_handle_t vertex_shader;
+	bgfx_shader_handle_t fragment_shader;
+	bgfx_program_handle_t program_shader;
+} Rodeo__data_t;