1 /* RetroArch - A frontend for libretro.
2 * Copyright (C) 2011-2017 - Daniel De Matteis
3 * Copyright (C) 2016-2019 - Brad Parker
4 *
5 * RetroArch is free software: you can redistribute it and/or modify it under the terms
6 * of the GNU General Public License as published by the Free Software Found-
7 * ation, either version 3 of the License, or (at your option) any later version.
8 *
9 * RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
10 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
11 * PURPOSE. See the GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along with RetroArch.
14 * If not, see <http://www.gnu.org/licenses/>.
15 */
16
17 #include <retro_miscellaneous.h>
18
19 #ifdef HAVE_CONFIG_H
20 #include "../../config.h"
21 #endif
22
23 #include "../../retroarch.h"
24 #include "../font_driver.h"
25 #include "../common/gl1_common.h"
26
27 #include "../gfx_display.h"
28
29 static const GLfloat gl1_menu_vertexes[] = {
30 0, 0,
31 1, 0,
32 0, 1,
33 1, 1
34 };
35
36 static const GLfloat gl1_menu_tex_coords[] = {
37 0, 1,
38 1, 1,
39 0, 0,
40 1, 0
41 };
42
gfx_display_gl1_get_default_vertices(void)43 static const float *gfx_display_gl1_get_default_vertices(void)
44 {
45 return &gl1_menu_vertexes[0];
46 }
47
gfx_display_gl1_get_default_tex_coords(void)48 static const float *gfx_display_gl1_get_default_tex_coords(void)
49 {
50 return &gl1_menu_tex_coords[0];
51 }
52
gfx_display_gl1_get_default_mvp(void * data)53 static void *gfx_display_gl1_get_default_mvp(void *data)
54 {
55 gl1_t *gl1 = (gl1_t*)data;
56
57 if (!gl1)
58 return NULL;
59
60 return &gl1->mvp_no_rot;
61 }
62
gfx_display_prim_to_gl1_enum(enum gfx_display_prim_type type)63 static GLenum gfx_display_prim_to_gl1_enum(
64 enum gfx_display_prim_type type)
65 {
66 switch (type)
67 {
68 case GFX_DISPLAY_PRIM_TRIANGLESTRIP:
69 return GL_TRIANGLE_STRIP;
70 case GFX_DISPLAY_PRIM_TRIANGLES:
71 return GL_TRIANGLES;
72 case GFX_DISPLAY_PRIM_NONE:
73 default:
74 break;
75 }
76
77 return 0;
78 }
79
gfx_display_gl1_blend_begin(void * data)80 static void gfx_display_gl1_blend_begin(void *data)
81 {
82 glEnable(GL_BLEND);
83 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
84 }
85
gfx_display_gl1_blend_end(void * data)86 static void gfx_display_gl1_blend_end(void *data)
87 {
88 glDisable(GL_BLEND);
89 }
90
gfx_display_gl1_draw(gfx_display_ctx_draw_t * draw,void * data,unsigned video_width,unsigned video_height)91 static void gfx_display_gl1_draw(gfx_display_ctx_draw_t *draw,
92 void *data,
93 unsigned video_width,
94 unsigned video_height)
95 {
96 video_shader_ctx_mvp_t mvp;
97 gl1_t *gl1 = (gl1_t*)data;
98
99 if (!gl1 || !draw)
100 return;
101
102 if (!draw->coords->vertex)
103 draw->coords->vertex = &gl1_menu_vertexes[0];
104 if (!draw->coords->tex_coord)
105 draw->coords->tex_coord = &gl1_menu_tex_coords[0];
106 if (!draw->coords->lut_tex_coord)
107 draw->coords->lut_tex_coord = &gl1_menu_tex_coords[0];
108 if (!draw->texture)
109 return;
110
111 glViewport(draw->x, draw->y, draw->width, draw->height);
112
113 glEnable(GL_TEXTURE_2D);
114
115 glBindTexture(GL_TEXTURE_2D, (GLuint)draw->texture);
116
117 mvp.data = gl1;
118 mvp.matrix = draw->matrix_data ? (math_matrix_4x4*)draw->matrix_data
119 : (math_matrix_4x4*)&gl1->mvp_no_rot;
120
121 glMatrixMode(GL_PROJECTION);
122 glPushMatrix();
123 glLoadMatrixf((const GLfloat*)mvp.matrix);
124
125 glMatrixMode(GL_MODELVIEW);
126 glPushMatrix();
127 glLoadIdentity();
128
129 glEnableClientState(GL_COLOR_ARRAY);
130 glEnableClientState(GL_VERTEX_ARRAY);
131 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
132
133 #ifdef VITA
134 {
135 unsigned i;
136 static float *vertices3 = NULL;
137
138 if (vertices3)
139 free(vertices3);
140 vertices3 = (float*)malloc(sizeof(float) * 3 * draw->coords->vertices);
141 for (i = 0; i < draw->coords->vertices; i++)
142 {
143 memcpy(&vertices3[i*3], &draw->coords->vertex[i*2], sizeof(float) * 2);
144 vertices3[i*3+2] = 0.0f;
145 }
146 glVertexPointer(3, GL_FLOAT, 0, vertices3);
147 }
148 #else
149 glVertexPointer(2, GL_FLOAT, 0, draw->coords->vertex);
150 #endif
151
152 glColorPointer(4, GL_FLOAT, 0, draw->coords->color);
153 glTexCoordPointer(2, GL_FLOAT, 0, draw->coords->tex_coord);
154
155 glDrawArrays(gfx_display_prim_to_gl1_enum(
156 draw->prim_type), 0, draw->coords->vertices);
157
158 glDisableClientState(GL_COLOR_ARRAY);
159 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
160 glDisableClientState(GL_VERTEX_ARRAY);
161
162 glMatrixMode(GL_MODELVIEW);
163 glPopMatrix();
164 glMatrixMode(GL_PROJECTION);
165 glPopMatrix();
166
167 gl1->coords.color = gl1->white_color_ptr;
168 }
169
gfx_display_gl1_font_init_first(void ** font_handle,void * video_data,const char * font_path,float menu_font_size,bool is_threaded)170 static bool gfx_display_gl1_font_init_first(
171 void **font_handle, void *video_data,
172 const char *font_path, float menu_font_size,
173 bool is_threaded)
174 {
175 font_data_t **handle = (font_data_t**)font_handle;
176 if (!(*handle = font_driver_init_first(video_data,
177 font_path, menu_font_size, true,
178 is_threaded,
179 FONT_DRIVER_RENDER_OPENGL1_API)))
180 return false;
181 return true;
182 }
183
gfx_display_gl1_scissor_begin(void * data,unsigned video_width,unsigned video_height,int x,int y,unsigned width,unsigned height)184 static void gfx_display_gl1_scissor_begin(void *data,
185 unsigned video_width,
186 unsigned video_height,
187 int x, int y,
188 unsigned width, unsigned height)
189 {
190 glScissor(x, video_height - y - height, width, height);
191 glEnable(GL_SCISSOR_TEST);
192 }
193
gfx_display_gl1_scissor_end(void * data,unsigned video_width,unsigned video_height)194 static void gfx_display_gl1_scissor_end(
195 void *data,
196 unsigned video_width,
197 unsigned video_height)
198 {
199 glScissor(0, 0, video_width, video_height);
200 glDisable(GL_SCISSOR_TEST);
201 }
202
203 gfx_display_ctx_driver_t gfx_display_ctx_gl1 = {
204 gfx_display_gl1_draw,
205 NULL, /* draw_pipeline */
206 gfx_display_gl1_blend_begin,
207 gfx_display_gl1_blend_end,
208 gfx_display_gl1_get_default_mvp,
209 gfx_display_gl1_get_default_vertices,
210 gfx_display_gl1_get_default_tex_coords,
211 gfx_display_gl1_font_init_first,
212 GFX_VIDEO_DRIVER_OPENGL1,
213 "gl1",
214 false,
215 gfx_display_gl1_scissor_begin,
216 gfx_display_gl1_scissor_end
217 };
218