util.c File Reference

#include "graphics_private.h"
#include <dttr_config.h>
#include <dttr_log.h>
#include <math.h>
#include <string.h>

Go to the source code of this file.

Macros
#define	DTTR_MESH_SEAM_FILL_PHYSICAL_PX   0.5f
#define	DTTR_MESH_SEAM_MAX_VERTEX_NUDGE_PHYSICAL_PX   0.75f
#define	DTTR_MESH_SEAM_MIN_AREA_PX   1.0e-4f

Functions
bool	dttr_graphics_ensure_staged_texture (DTTR_BackendState *state, DTTR_StagedTexture *st)
DTTR_PresentRect	dttr_graphics_compute_present_rect (int dst_w, int dst_h, int src_w, int src_h, bool stretch, bool integer_fit, float fallback_scale)
int	dttr_graphics_calc_mip_levels (int w, int h)
void	dttr_graphics_mat4_identity (float *m)
const char *	dttr_graphics_shader_format_name (SDL_GPUShaderFormat format)
SDL_GPUShaderFormat	dttr_graphics_requested_shader_formats ()
SDL_GPUShaderFormat	dttr_graphics_select_shader_format (SDL_GPUShaderFormat formats)
SDL_GPUShaderFormat	dttr_graphics_shader_format_for_driver (const char *driver)
SDL_GPUShaderFormat	dttr_graphics_select_shader_format_for_driver (const char *driver, SDL_GPUShaderFormat formats)
bool	dttr_graphics_is_gpu_thread ()
bool	dttr_graphics_should_fill_mesh_seams (DTTR_PrimitiveType type, bool transformed, bool depth_test, bool blend_enabled)
	Returns true when a draw call should receive subpixel logical-scaling seam fill.
static void	fill_mesh_seam_triangle (DTTR_Vertex *tri, float logical_to_px_x, float logical_to_px_y, float px_to_logical_x, float px_to_logical_y)
void	dttr_graphics_fill_mesh_seams (DTTR_Vertex *verts, uint32_t count, int logical_width, int logical_height, int render_width, int render_height)
	Expands triangle-list vertices by a tiny physical-pixel amount to hide mesh cracks.

Variables
DTTR_BackendState	dttr_backend

Macro Definition Documentation

DTTR_MESH_SEAM_FILL_PHYSICAL_PX

#define DTTR_MESH_SEAM_FILL_PHYSICAL_PX   0.5f

Definition at line 10 of file util.c.

Referenced by fill_mesh_seam_triangle().

DTTR_MESH_SEAM_MAX_VERTEX_NUDGE_PHYSICAL_PX

#define DTTR_MESH_SEAM_MAX_VERTEX_NUDGE_PHYSICAL_PX   0.75f

Definition at line 11 of file util.c.

Referenced by fill_mesh_seam_triangle().

DTTR_MESH_SEAM_MIN_AREA_PX

#define DTTR_MESH_SEAM_MIN_AREA_PX   1.0e-4f

Definition at line 12 of file util.c.

Referenced by fill_mesh_seam_triangle().

Function Documentation

dttr_graphics_calc_mip_levels()

int dttr_graphics_calc_mip_levels	(	int	w,
		int	h )

Definition at line 104 of file util.c.

References d, h, and w.

Referenced by dttr_graphics_ensure_staged_texture().

dttr_graphics_compute_present_rect()

DTTR_PresentRect dttr_graphics_compute_present_rect	(	int	dst_w,
		int	dst_h,
		int	src_w,
		int	src_h,
		bool	stretch,
		bool	integer_fit,
		float	fallback_scale )

Definition at line 48 of file util.c.

References float, and rect.

Referenced by end_frame(), end_frame(), present_video_frame_bgra(), and present_video_frame_bgra().

dttr_graphics_ensure_staged_texture()

bool dttr_graphics_ensure_staged_texture	(	DTTR_BackendState *	state,
		DTTR_StagedTexture *	st )

Definition at line 14 of file util.c.

References dttr_graphics_calc_mip_levels(), DTTR_LOG_WARN, NULL, st, and state.

Referenced by collect_and_upload_pending(), and d3d_device7_texture_bind().

dttr_graphics_fill_mesh_seams()

void dttr_graphics_fill_mesh_seams	(	DTTR_Vertex *	verts,
		uint32_t	count,
		int	logical_width,
		int	logical_height,
		int	render_width,
		int	render_height )

Expands triangle-list vertices by a tiny physical-pixel amount to hide mesh cracks.

Definition at line 280 of file util.c.

References count, fill_mesh_seam_triangle(), and float.

Referenced by d3d_device7_record_draw().

dttr_graphics_is_gpu_thread()

bool dttr_graphics_is_gpu_thread

(

)

Definition at line 182 of file util.c.

References dttr_backend, and state.

Referenced by begin_frame(), d3d_device7_record_clear(), d3d_device7_record_draw(), d3d_device7_texture_bind(), and present_video_frame_bgra().

dttr_graphics_mat4_identity()

void dttr_graphics_mat4_identity

(

float *

m

)

Definition at line 116 of file util.c.

References DTTR_MAT4_SIZE.

Referenced by init_common_state(), and present_video_frame_bgra().

dttr_graphics_requested_shader_formats()

SDL_GPUShaderFormat dttr_graphics_requested_shader_formats

(

)

Definition at line 136 of file util.c.

Referenced by create_device().

dttr_graphics_select_shader_format()

SDL_GPUShaderFormat dttr_graphics_select_shader_format

(

SDL_GPUShaderFormat

formats

)

Definition at line 140 of file util.c.

Referenced by dttr_graphics_select_shader_format_for_driver().

dttr_graphics_select_shader_format_for_driver()

SDL_GPUShaderFormat dttr_graphics_select_shader_format_for_driver	(	const char *	driver,
		SDL_GPUShaderFormat	formats )

Definition at line 169 of file util.c.

References dttr_graphics_select_shader_format(), and dttr_graphics_shader_format_for_driver().

Referenced by try_create_device_for_driver().

dttr_graphics_shader_format_for_driver()

SDL_GPUShaderFormat dttr_graphics_shader_format_for_driver

(

const char *

driver

)

Definition at line 152 of file util.c.

References DTTR_DRIVER_DIRECT3D12, and DTTR_DRIVER_VULKAN.

Referenced by dttr_graphics_select_shader_format_for_driver().

dttr_graphics_shader_format_name()

const char * dttr_graphics_shader_format_name

(

SDL_GPUShaderFormat

format

)

Definition at line 121 of file util.c.

Referenced by create_shader(), and dttr_graphics_sdl3gpu_init().

dttr_graphics_should_fill_mesh_seams()

bool dttr_graphics_should_fill_mesh_seams	(	DTTR_PrimitiveType	type,
		bool	transformed,
		bool	depth_test,
		bool	blend_enabled )

Returns true when a draw call should receive subpixel logical-scaling seam fill.

Definition at line 198 of file util.c.

References dttr_config, DTTR_PRIM_TRIANGLELIST, DTTR_SCALING_METHOD_LOGICAL, DTTR_VERTEX_PRECISION_SUBPIXEL, and type.

Referenced by d3d_device7_record_draw().

fill_mesh_seam_triangle()

void fill_mesh_seam_triangle ( DTTR_Vertex * tri, float logical_to_px_x, float logical_to_px_y, float px_to_logical_x, float px_to_logical_y )

static

Definition at line 211 of file util.c.

References c, DTTR_MESH_SEAM_FILL_PHYSICAL_PX, DTTR_MESH_SEAM_MAX_VERTEX_NUDGE_PHYSICAL_PX, DTTR_MESH_SEAM_MIN_AREA_PX, DTTR_Vertex::x, x, DTTR_Vertex::y, and y.

Referenced by dttr_graphics_fill_mesh_seams().

Variable Documentation

dttr_backend

DTTR_BackendState dttr_backend

Definition at line 8 of file util.c.

Referenced by create_shader(), d3d_device7_get_transform_state(), d3d_device7_record_clear(), d3d_device7_record_draw(), d3d_device7_set_blend_func(), d3d_device7_set_texture_address_u(), d3d_device7_set_texture_address_v(), d3d_device7_set_viewport(), d3d_device7_texture_bind(), d3ddevice7_gettexturestagestate(), d3ddevice7_getviewport(), d3ddevice7_setrenderstate(), d3ddevice7_settexturestagestate(), dttr_graphics_begin_frame(), dttr_graphics_cleanup(), dttr_graphics_end_frame(), dttr_graphics_get_device(), dttr_graphics_get_window(), dttr_graphics_handle_window_resize(), dttr_graphics_init(), dttr_graphics_is_gpu_thread(), dttr_graphics_present_video_frame_bgra(), dttr_graphics_sdl3gpu_create_pipelines(), dttr_graphics_sdl3gpu_create_resources(), dttr_graphics_sdl3gpu_resize_render_textures(), dttr_graphics_set_logical_resolution(), DTTR_Hook_WinMainCallback(), surface_present(), surface_texture_cache_lookup_locked(), surface_texture_create_or_retain(), surface_texture_refcount(), surface_texture_release(), surface_texture_retain(), surface_texture_update_unique(), and toggle_fullscreen().