backend_opengl.c File Reference

#include "backend_opengl_private.h"
#include "graphics_private.h"
#include <dttr_log.h>
#include <dttr_config.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "gen/opengl_shaders.h"

Go to the source code of this file.

Macros
#define	DRIVER_DISPLAY_OPENGL   "OpenGL 3.3"

Functions
static GLuint	compile_shader (GLenum type, const char *source)
static GLuint	create_program ()
static bool	create_fbo (opengl_backend_data *gl, int width, int height)
static void	destroy_fbo (opengl_backend_data *gl)
static void	create_samplers (opengl_backend_data *gl)
static int	select_gl_msaa_samples ()
static bool	create_msaa_fbo (opengl_backend_data *gl, int w, int h, int samples)
static void	destroy_msaa_fbo (opengl_backend_data *gl)
static void	release_deferred_gl_destroys (DTTR_BackendState *state, opengl_backend_data *gl)
static void	defer_texture_destroy (DTTR_BackendState *state, int texture_index)
bool	dttr_graphics_opengl_init (DTTR_BackendState *state)
static bool	resize_fbo (DTTR_BackendState *state, int width, int height)
static void	upload_pending_textures_gl (DTTR_BackendState *state, opengl_backend_data *gl)
static void	upload_video_texture (opengl_backend_data *gl, const uint8_t *pixels, int width, int height)
static void	begin_frame (DTTR_BackendState *state)
static void	replay_batch_records_gl (DTTR_BackendState *state, opengl_backend_data *gl)
static void	end_frame (DTTR_BackendState *state)
static bool	present_video_frame_bgra (DTTR_BackendState *state, const uint8_t *pixels, int width, int height, int stride)
static void	cleanup (DTTR_BackendState *state)
static const char *	get_driver_name (const DTTR_BackendState *state)

Variables
static const DTTR_RendererVtbl	renderer

Macro Definition Documentation

DRIVER_DISPLAY_OPENGL

#define DRIVER_DISPLAY_OPENGL   "OpenGL 3.3"

Definition at line 11 of file backend_opengl.c.

Referenced by get_driver_name().

Function Documentation

begin_frame()

void begin_frame ( DTTR_BackendState * state )

static

Definition at line 554 of file backend_opengl.c.

References dttr_graphics_mod_frame_begin(), release_deferred_gl_destroys(), state, upload_pending_textures_gl(), and opengl_backend_data::vertex_staging.

cleanup()

void cleanup ( DTTR_BackendState * state )

static

Definition at line 904 of file backend_opengl.c.

References destroy_fbo(), destroy_msaa_fbo(), DTTR_MAX_STAGED_TEXTURES, DTTR_SAMPLER_COUNT, opengl_backend_data::dummy_texture, free, opengl_backend_data::gl_context, opengl_backend_data::gl_samplers, opengl_backend_data::gl_textures, NULL, opengl_backend_data::program, release_deferred_gl_destroys(), state, opengl_backend_data::vao, opengl_backend_data::vbo, opengl_backend_data::vertex_staging, and opengl_backend_data::video_texture.

Referenced by DTTR_Hook_WinMainCallback(), dttr_launcher_main(), DTTR_PCDOGS_PatchGroup_Install(), and test_pcdogs_generated_function_patch_specs_name_current_hooks().

compile_shader()

GLuint compile_shader ( GLenum type, const char * source )

static

Definition at line 26 of file backend_opengl.c.

References DTTR_LOG_ERROR, NULL, source, and type.

Referenced by create_program().

create_fbo()

bool create_fbo ( opengl_backend_data * gl, int width, int height )

static

Definition at line 85 of file backend_opengl.c.

References DTTR_LOG_ERROR, opengl_backend_data::fbo, opengl_backend_data::fbo_color_tex, opengl_backend_data::fbo_depth_rbo, opengl_backend_data::fbo_height, opengl_backend_data::fbo_width, and NULL.

Referenced by dttr_graphics_opengl_init(), and resize_fbo().

create_msaa_fbo()

bool create_msaa_fbo ( opengl_backend_data * gl, int w, int h, int samples )

static

Definition at line 193 of file backend_opengl.c.

References DTTR_LOG_ERROR, h, opengl_backend_data::msaa_color_rbo, opengl_backend_data::msaa_depth_rbo, opengl_backend_data::msaa_fbo, opengl_backend_data::msaa_samples, samples, and w.

Referenced by dttr_graphics_opengl_init(), and resize_fbo().

create_program()

GLuint create_program ( )

static

Definition at line 49 of file backend_opengl.c.

References compile_shader(), DTTR_LOG_ERROR, and NULL.

Referenced by dttr_graphics_opengl_init().

create_samplers()

void create_samplers ( opengl_backend_data * gl )

static

Definition at line 152 of file backend_opengl.c.

References dttr_config, DTTR_SAMPLER_COUNT, and opengl_backend_data::gl_samplers.

Referenced by dttr_graphics_opengl_init().

defer_texture_destroy()

void defer_texture_destroy ( DTTR_BackendState * state, int texture_index )

static

Definition at line 269 of file backend_opengl.c.

References opengl_backend_data::deferred_gl_destroy_count, opengl_backend_data::deferred_gl_destroys, DTTR_MAX_STAGED_TEXTURES, opengl_backend_data::gl_textures, and state.

destroy_fbo()

void destroy_fbo ( opengl_backend_data * gl )

static

Definition at line 135 of file backend_opengl.c.

References opengl_backend_data::fbo, opengl_backend_data::fbo_color_tex, and opengl_backend_data::fbo_depth_rbo.

Referenced by cleanup(), and resize_fbo().

destroy_msaa_fbo()

void destroy_msaa_fbo ( opengl_backend_data * gl )

static

Definition at line 229 of file backend_opengl.c.

References opengl_backend_data::msaa_color_rbo, opengl_backend_data::msaa_depth_rbo, opengl_backend_data::msaa_fbo, and opengl_backend_data::msaa_samples.

Referenced by cleanup(), dttr_graphics_opengl_init(), and resize_fbo().

dttr_graphics_opengl_init()

bool dttr_graphics_opengl_init

(

DTTR_BackendState *

state

)

Definition at line 288 of file backend_opengl.c.

References create_fbo(), create_msaa_fbo(), create_program(), create_samplers(), destroy_msaa_fbo(), DTTR_BACKEND_OPENGL, DTTR_LOG_ERROR, DTTR_LOG_INFO, DTTR_LOG_WARN, DTTR_MAX_FRAME_VERTICES, DTTR_VERTEX_SIZE, opengl_backend_data::dummy_texture, free, opengl_backend_data::gl_context, opengl_backend_data::loc_alpha_arg1, opengl_backend_data::loc_alpha_arg2, opengl_backend_data::loc_alpha_op, opengl_backend_data::loc_color_arg1, opengl_backend_data::loc_color_arg2, opengl_backend_data::loc_color_op, opengl_backend_data::loc_has_texture, opengl_backend_data::loc_is_2d, opengl_backend_data::loc_mvp, opengl_backend_data::loc_screen_size, opengl_backend_data::loc_texture, NULL, opengl_backend_data::program, renderer, select_gl_msaa_samples(), state, stride, opengl_backend_data::vao, opengl_backend_data::vbo, and opengl_backend_data::vertex_staging.

end_frame()

void end_frame ( DTTR_BackendState * state )

static

Definition at line 705 of file backend_opengl.c.

References dttr_config, dttr_graphics_compute_present_rect(), dttr_graphics_mod_after_game_frame(), dttr_graphics_mod_before_game_frame(), dttr_graphics_mod_frame_end(), dttr_graphics_mod_present_rect_after(), dttr_graphics_mod_present_rect_before(), dttr_imgui_render_game_opengl(), dttr_imgui_render_opengl(), DTTR_SCALING_METHOD_LOGICAL, DTTR_SCALING_MODE_INTEGER, DTTR_SCALING_MODE_STRETCH, DTTR_VERTEX_SIZE, opengl_backend_data::fbo, opengl_backend_data::fbo_height, opengl_backend_data::fbo_width, DTTR_PresentRect::h, opengl_backend_data::msaa_fbo, opengl_backend_data::msaa_samples, NULL, replay_batch_records_gl(), state, opengl_backend_data::vbo, opengl_backend_data::vertex_staging, DTTR_PresentRect::w, DTTR_PresentRect::x, and DTTR_PresentRect::y.

get_driver_name()

const char * get_driver_name ( const DTTR_BackendState * state )

static

Definition at line 951 of file backend_opengl.c.

References DRIVER_DISPLAY_OPENGL, and state.

present_video_frame_bgra()

bool present_video_frame_bgra ( DTTR_BackendState * state, const uint8_t * pixels, int width, int height, int stride )

static

Definition at line 814 of file backend_opengl.c.

References DTTR_D3DTA_DIFFUSE, DTTR_D3DTA_TEXTURE, DTTR_D3DTOP_MODULATE, DTTR_D3DTOP_SELECTARG1, dttr_graphics_compute_present_rect(), dttr_graphics_mat4_identity(), float, DTTR_PresentRect::h, opengl_backend_data::loc_alpha_arg1, opengl_backend_data::loc_alpha_arg2, opengl_backend_data::loc_alpha_op, opengl_backend_data::loc_color_arg1, opengl_backend_data::loc_color_arg2, opengl_backend_data::loc_color_op, opengl_backend_data::loc_has_texture, opengl_backend_data::loc_is_2d, opengl_backend_data::loc_mvp, opengl_backend_data::loc_screen_size, opengl_backend_data::loc_texture, opengl_backend_data::program, state, stride, upload_video_texture(), opengl_backend_data::vao, opengl_backend_data::vbo, opengl_backend_data::video_texture, DTTR_PresentRect::w, DTTR_PresentRect::x, and DTTR_PresentRect::y.

release_deferred_gl_destroys()

void release_deferred_gl_destroys ( DTTR_BackendState * state, opengl_backend_data * gl )

static

Definition at line 248 of file backend_opengl.c.

References opengl_backend_data::deferred_gl_destroy_count, opengl_backend_data::deferred_gl_destroys, and state.

Referenced by begin_frame(), and cleanup().

replay_batch_records_gl()

void replay_batch_records_gl ( DTTR_BackendState * state, opengl_backend_data * gl )

static

Definition at line 573 of file backend_opengl.c.

References DTTR_Uniforms::alpha_arg1, DTTR_Uniforms::alpha_arg2, DTTR_Uniforms::alpha_op, DTTR_BatchRecord::blend_mode, DTTR_BatchRecord::clear, DTTR_BatchRecord::color, DTTR_Uniforms::color_arg1, DTTR_Uniforms::color_arg2, DTTR_Uniforms::color_op, DTTR_BatchRecord::depth, DTTR_BatchRecord::depth_test, DTTR_BatchRecord::depth_write, DTTR_BatchRecord::draw, DTTR_BATCH_CLEAR, DTTR_BLEND_ADDITIVE, DTTR_BLEND_OFF, DTTR_CLEAR_COLOR, DTTR_CLEAR_DEPTH, DTTR_MAX_STAGED_TEXTURES, opengl_backend_data::dummy_texture, opengl_backend_data::fbo, opengl_backend_data::fbo_height, opengl_backend_data::fbo_width, DTTR_BatchRecord::first_vertex, DTTR_BatchRecord::flags, opengl_backend_data::gl_samplers, opengl_backend_data::gl_textures, DTTR_Uniforms::has_texture, DTTR_Uniforms::is_2d, opengl_backend_data::loc_alpha_arg1, opengl_backend_data::loc_alpha_arg2, opengl_backend_data::loc_alpha_op, opengl_backend_data::loc_color_arg1, opengl_backend_data::loc_color_arg2, opengl_backend_data::loc_color_op, opengl_backend_data::loc_has_texture, opengl_backend_data::loc_is_2d, opengl_backend_data::loc_mvp, opengl_backend_data::loc_screen_size, opengl_backend_data::loc_texture, opengl_backend_data::msaa_fbo, opengl_backend_data::msaa_samples, DTTR_Uniforms::mvp, opengl_backend_data::program, DTTR_BatchRecord::sampler_index, DTTR_Uniforms::screen_size, state, DTTR_BatchRecord::texture_index, DTTR_BatchRecord::type, DTTR_BatchRecord::uniforms, opengl_backend_data::vao, and DTTR_BatchRecord::vertex_count.

Referenced by end_frame().

resize_fbo()

bool resize_fbo ( DTTR_BackendState * state, int width, int height )

static

Definition at line 418 of file backend_opengl.c.

References create_fbo(), create_msaa_fbo(), destroy_fbo(), destroy_msaa_fbo(), DTTR_LOG_ERROR, DTTR_LOG_INFO, DTTR_LOG_WARN, opengl_backend_data::fbo_height, opengl_backend_data::fbo_width, opengl_backend_data::msaa_samples, and state.

select_gl_msaa_samples()

int select_gl_msaa_samples ( )

static

Definition at line 172 of file backend_opengl.c.

References dttr_config.

Referenced by dttr_graphics_opengl_init().

upload_pending_textures_gl()

void upload_pending_textures_gl ( DTTR_BackendState * state, opengl_backend_data * gl )

static

Definition at line 452 of file backend_opengl.c.

References dttr_config, free, opengl_backend_data::gl_textures, NULL, opengl_backend_data::pending_mipmap_count, opengl_backend_data::pending_mipmap_textures, st, and state.

Referenced by begin_frame().

upload_video_texture()

void upload_video_texture ( opengl_backend_data * gl, const uint8_t * pixels, int width, int height )

static

Definition at line 523 of file backend_opengl.c.

References opengl_backend_data::video_height, opengl_backend_data::video_texture, and opengl_backend_data::video_width.

Referenced by present_video_frame_bgra().

Variable Documentation

renderer

const DTTR_RendererVtbl renderer

static

Initial value:

                                        = {
    .begin_frame = begin_frame,
    .end_frame = end_frame,
    .present_video_frame_bgra = present_video_frame_bgra,
    .resize = resize_fbo,
    .cleanup = cleanup,
    .get_driver_name = get_driver_name,
    .defer_texture_destroy = defer_texture_destroy,
}

Definition at line 22 of file backend_opengl.c.

Referenced by dttr_graphics_opengl_init(), and dttr_graphics_sdl3gpu_init().