diff options
Diffstat (limited to 'src/gfx/rodeo_gfx.c')
| -rw-r--r-- | src/gfx/rodeo_gfx.c | 49 |
1 files changed, 39 insertions, 10 deletions
diff --git a/src/gfx/rodeo_gfx.c b/src/gfx/rodeo_gfx.c index 04d923f..9004370 100644 --- a/src/gfx/rodeo_gfx.c +++ b/src/gfx/rodeo_gfx.c @@ -20,12 +20,14 @@ static irodeo_gfx_state_t irodeo_gfx_state = {0}; void -rodeo_gfx_init(void) +rodeo_gfx_init(float width, float height) { #ifdef __EMSCRIPTEN__ bgfx_render_frame(-1); #endif + irodeo_gfx_state.target_width = width; + irodeo_gfx_state.target_height = height; bgfx_platform_data_t pd = {0}; memset(&pd, 0, sizeof(bgfx_platform_data_t)); @@ -59,7 +61,8 @@ rodeo_gfx_init(void) bgfx_set_view_clear( 0, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH, - 0x443355FF, + //0x443355FF, + 0x000000FF, 1.0f, 0 ); @@ -205,23 +208,49 @@ rodeo_gfx_frame_begin(void) glm_mat4_identity(irodeo_gfx_state.view_matrix); //glm_perspective(glm_rad(60.f), 640.f / 480.f, 0.1f, 100.0f, proj); + + // scale the game screen to fit window size with letterbox + // what size we declare the game screen to be within + const float target_width = irodeo_gfx_state.target_width; + const float target_height = irodeo_gfx_state.target_height; + // what the calculated size is to fit in the window + float result_width = target_width; + float result_height = target_height; + const float game_aspect = target_width / target_height; + const float window_aspect = (float)rodeo_window_screen_width_get()/(float)rodeo_window_screen_height_get(); + if(window_aspect > game_aspect) + { + result_width /= (game_aspect) / window_aspect; + } + else + { + result_height *= (game_aspect) / window_aspect; + } + + // make the game screen centered in the window. + // "2" is 1 full screen width, therefore we multiply + // the target and result ratio by 1 for it to be a + // half of the screen size + vec3 offset = { + 1 - (1 * (target_width / result_width)), // x + -(1 - (1 * (target_height / result_height))), // y + 0 + }; - // TODO: figure out if why 'zo' is correct - // but 'no' is incorrect glm_ortho_rh_zo( 0, - (float)rodeo_window_screen_width_get(), - (float)rodeo_window_screen_height_get(), + result_width, + result_height, 0, - // near - -0.1f, - // far + -100.0f, 100.0f, irodeo_gfx_state.proj_matrix ); + glm_translated(irodeo_gfx_state.proj_matrix, offset); + bgfx_set_view_transform(0, irodeo_gfx_state.view_matrix, irodeo_gfx_state.proj_matrix); - bgfx_set_view_rect(0, 0, 0, rodeo_window_screen_width_get(), rodeo_window_screen_height_get()); + bgfx_set_view_rect(0, 0, 0, (uint16_t)rodeo_window_screen_width_get(), (uint16_t)rodeo_window_screen_height_get()); irodeo_gfx_render_buffer_transient_alloc(); bgfx_touch(0); |