mirror of
https://github.com/nunuhara/xsystem4.git
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Nunuhara Cabbage
9089fa1fd1
Only unscaled glyph bitmaps are now cached in regular memory. Scaled glyphs are stored as textures on the GPU. Only the alpha channel on glyph textures is used, with the color being provided as an input to the shader. Outline and bold rendering is improved by using a simple dilate shader. This looks okay but could be improved (the result is a bit blurry still).
239 lines
9.9 KiB
C
239 lines
9.9 KiB
C
/* Copyright (C) 2019 Nunuhara Cabbage <nunuhara@haniwa.technology>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://gnu.org/licenses/>.
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*/
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#ifndef SYSTEM4_GFX_CORE_H
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#define SYSTEM4_GFX_CORE_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <SDL.h>
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#include "gfx/gl.h"
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#include "gfx/types.h"
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struct cg;
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struct text_metrics;
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enum cg_type;
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enum draw_method {
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DRAW_METHOD_NORMAL,
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DRAW_METHOD_SCREEN,
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DRAW_METHOD_MULTIPLY,
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DRAW_METHOD_ADDITIVE,
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};
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typedef struct texture {
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GLuint handle;
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mat4 world_transform;
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int w, h;
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bool has_alpha;
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int alpha_mod;
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enum draw_method draw_method;
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} Texture;
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struct gfx_render_job;
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typedef struct shader {
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GLuint program;
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// variables
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GLuint world_transform;
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GLuint view_transform;
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GLuint texture;
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GLuint vertex;
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GLuint alpha_mod;
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void (*prepare)(struct gfx_render_job *, void *);
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} Shader;
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struct gfx_render_job {
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struct shader *shader;
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GLuint texture;
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GLfloat *world_transform;
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GLfloat *view_transform;
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void *data;
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};
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int gfx_init(void);
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void gfx_fini(void);
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Texture *gfx_main_surface(void);
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void gfx_set_window_logical_size(int w, int h);
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void gfx_update_screen_scale(void);
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void gfx_set_wait_vsync(bool wait);
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void gfx_load_shader(struct shader *dst, const char *vertex_shader_path, const char *fragment_shader_path);
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// rendering
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void gfx_set_clear_color(int r, int g, int b, int a);
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void gfx_clear(void);
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void gfx_swap(void);
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void gfx_prepare_job(struct gfx_render_job *job);
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void gfx_run_job(struct gfx_render_job *job);
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void gfx_render(struct gfx_render_job *job);
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void gfx_render_texture(struct texture *t, Rectangle *r);
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// texture management
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void gfx_init_texture_blank(struct texture *t, int w, int h);
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void gfx_init_texture_with_cg(struct texture *t, struct cg *cg);
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void gfx_init_texture_rgba(struct texture *t, int w, int h, SDL_Color color);
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void gfx_init_texture_rgb(struct texture *t, int w, int h, SDL_Color color);
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void gfx_init_texture_with_pixels(struct texture *t, int w, int h, void *pixels);
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void gfx_init_texture_amap(struct texture *t, int w, int h, uint8_t *amap, SDL_Color color);
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void gfx_copy_main_surface(struct texture *dst);
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void gfx_delete_texture(struct texture *t);
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GLuint gfx_set_framebuffer(GLenum target, Texture *t, int x, int y, int w, int h);
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void gfx_reset_framebuffer(GLenum target, GLuint fbo);
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SDL_Color gfx_get_pixel(Texture *t, int x, int y);
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void *gfx_get_pixels(Texture *t);
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int gfx_save_texture(Texture *t, const char *path, enum cg_type);
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// drawing
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void gfx_draw_init(void);
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void gfx_copy(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_bright(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int rate);
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void gfx_copy_amap(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_sprite(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, SDL_Color color);
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void gfx_sprite_copy_amap(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int alpha_key);
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void gfx_copy_color_reverse(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_use_amap_under(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int threshold);
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void gfx_copy_use_amap_border(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int threshold);
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void gfx_copy_amap_max(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_amap_min(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_blend(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int a);
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void gfx_blend_amap(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_blend_amap_color(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int r, int g, int b);
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void gfx_blend_amap_alpha(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int a);
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void gfx_fill(struct texture *dst, int x, int y, int w, int h, int r, int g, int b);
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void gfx_fill_alpha_color(struct texture *dst, int x, int y, int w, int h, int r, int g, int b, int a);
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void gfx_fill_amap(struct texture *dst, int x, int y, int w, int h, int a);
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void gfx_add_da_daxsa(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_blend_da_daxsa(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_sub_da_daxsa(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_stretch(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh);
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void gfx_copy_stretch_amap(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh);
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void gfx_copy_stretch_blend(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh, int a);
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void gfx_copy_stretch_blend_amap(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh);
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void gfx_copy_rot_zoom(Texture *dst, Texture *src, int sx, int sy, int w, int h, float rotate, float mag);
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void gfx_copy_rot_zoom_amap(Texture *dst, Texture *src, int sx, int sy, int w, int h, float rotate, float mag);
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void gfx_copy_rot_zoom_use_amap(Texture *dst, Texture *src, int sx, int sy, int w, int h, float rotate, float mag);
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void gfx_copy_reverse_LR(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_copy_reverse_amap_LR(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_fill_amap_over_border(Texture *dst, int x, int y, int w, int h, int alpha, int border);
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void gfx_fill_amap_under_border(Texture *dst, int x, int y, int w, int h, int alpha, int border);
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void gfx_copy_rotate_y(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_rotate_y_use_amap(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_rotate_x(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_rotate_x_use_amap(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_width_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_height_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_amap_width_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_amap_height_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_with_alpha_map(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_fill_with_alpha(Texture *dst, int x, int y, int w, int h, int r, int g, int b, int a);
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void gfx_copy_stretch_with_alpha_map(Texture *dst, int dx, int dy, int dw, int dh, Texture *src, int sx, int sy, int sw, int sh);
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void gfx_draw_glyph(Texture *dst, float dx, int dy, Texture *glyph, SDL_Color color, float scale_x, float bold_width);
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enum {
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FW_NORMAL = 400,
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FW_BOLD = 700,
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FW_NORMAL2 = 1400,
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FW_BOLD2 = 1700
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};
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enum font_face {
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FONT_GOTHIC = 0,
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FONT_MINCHO = 1
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};
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extern const char *font_paths[2];
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struct text_metrics {
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SDL_Color color;
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SDL_Color outline_color;
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unsigned int size;
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int weight;
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enum font_face face;
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int outline_left;
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int outline_up;
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int outline_right;
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int outline_down;
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};
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struct font_metrics {
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int size;
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enum font_face face;
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int weight;
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bool underline;
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bool strikeout;
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int space;
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SDL_Color color;
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};
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void gfx_font_init(void);
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bool gfx_set_font(enum font_face face, unsigned int size);
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bool gfx_set_font_size(unsigned int size);
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bool gfx_set_font_face(enum font_face face);
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bool gfx_set_font_weight(int weight);
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bool gfx_set_font_underline(bool on);
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bool gfx_set_font_strikeout(bool on);
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bool gfx_set_font_space(int space);
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bool gfx_set_font_color(SDL_Color color);
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int gfx_get_font_size(void);
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enum font_face gfx_get_font_face(void);
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int gfx_get_font_weight(void);
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bool gfx_get_font_underline(void);
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bool gfx_get_font_strikeout(void);
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int gfx_get_font_space(void);
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SDL_Color gfx_get_font_color(void);
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void gfx_set_font_name(const char *name);
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int gfx_render_text(Texture *dst, Point pos, char *msg, struct text_metrics *tm, int char_space);
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void gfx_draw_text_to_amap(Texture *dst, int x, int y, char *text);
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void gfx_draw_text_to_pmap(Texture *dst, int x, int y, char *text);
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struct fnl_font_inst {
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struct fnl_font_face *font;
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float scale;
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SDL_Color color;
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SDL_Color outline_color;
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int outline_size;
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};
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struct fnl_render_size;
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struct text_style {
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unsigned font_type;
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float size;
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float bold_width;
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SDL_Color color;
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float edge_width;
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SDL_Color edge_color;
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float scale_x;
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float space_scale_x;
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float font_spacing;
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struct fnl_render_size *font_size;
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};
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void fnl_renderer_init(const char *path);
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void fnl_renderer_fini(void);
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float fnl_draw_text(struct text_style *ts, Texture *dst, float x, int y, char *text);
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float fnl_size_text(struct text_style *ts, char *text);
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float fnl_get_actual_font_size(int font_type, float size);
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float fnl_get_actual_font_size_round_down(int font_type, float size);
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#endif /* SYSTEM4_SDL_CORE_H */
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