b9801854 |
1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | |
4 | #include <EGL/egl.h> |
5 | #include <GLES/gl.h> |
0d645bc5 |
6 | #include "gl_platform.h" |
b9801854 |
7 | #include "gl.h" |
8 | |
9 | static EGLDisplay edpy; |
10 | static EGLSurface esfc; |
11 | static EGLContext ectxt; |
12 | |
6fd09356 |
13 | /* for external flips */ |
14 | void *gl_es_display; |
15 | void *gl_es_surface; |
16 | |
b9801854 |
17 | static int gl_have_error(const char *name) |
18 | { |
19 | GLenum e = glGetError(); |
20 | if (e != GL_NO_ERROR) { |
21 | fprintf(stderr, "GL error: %s %x\n", name, e); |
22 | return 1; |
23 | } |
24 | return 0; |
25 | } |
26 | |
27 | static int gles_have_error(const char *name) |
28 | { |
29 | EGLint e = eglGetError(); |
30 | if (e != EGL_SUCCESS) { |
31 | fprintf(stderr, "%s %x\n", name, e); |
32 | return 1; |
33 | } |
34 | return 0; |
35 | } |
36 | |
0d645bc5 |
37 | int gl_init(void *display, void *window, int *quirks) |
b9801854 |
38 | { |
39 | EGLConfig ecfg = NULL; |
40 | GLuint texture_name = 0; |
41 | void *tmp_texture_mem = NULL; |
42 | EGLint num_config; |
43 | int retval = -1; |
44 | int ret; |
45 | EGLint attr[] = |
46 | { |
47 | EGL_NONE |
48 | }; |
49 | |
0d645bc5 |
50 | ret = gl_platform_init(&display, &window, quirks); |
51 | if (ret != 0) { |
52 | fprintf(stderr, "gl_platform_init failed with %d\n", ret); |
53 | goto out; |
54 | } |
55 | |
b9801854 |
56 | tmp_texture_mem = calloc(1, 1024 * 512 * 2); |
57 | if (tmp_texture_mem == NULL) { |
58 | fprintf(stderr, "OOM\n"); |
59 | goto out; |
60 | } |
61 | |
62 | edpy = eglGetDisplay((EGLNativeDisplayType)display); |
63 | if (edpy == EGL_NO_DISPLAY) { |
64 | fprintf(stderr, "Failed to get EGL display\n"); |
65 | goto out; |
66 | } |
67 | |
68 | if (!eglInitialize(edpy, NULL, NULL)) { |
69 | fprintf(stderr, "Failed to initialize EGL\n"); |
70 | goto out; |
71 | } |
72 | |
73 | if (!eglChooseConfig(edpy, attr, &ecfg, 1, &num_config)) { |
74 | fprintf(stderr, "Failed to choose config (%x)\n", eglGetError()); |
75 | goto out; |
76 | } |
77 | |
78 | if (ecfg == NULL || num_config == 0) { |
79 | fprintf(stderr, "No EGL configs available\n"); |
80 | goto out; |
81 | } |
82 | |
83 | esfc = eglCreateWindowSurface(edpy, ecfg, |
84 | (EGLNativeWindowType)window, NULL); |
85 | if (esfc == EGL_NO_SURFACE) { |
86 | fprintf(stderr, "Unable to create EGL surface (%x)\n", |
87 | eglGetError()); |
88 | goto out; |
89 | } |
90 | |
91 | ectxt = eglCreateContext(edpy, ecfg, EGL_NO_CONTEXT, NULL); |
92 | if (ectxt == EGL_NO_CONTEXT) { |
93 | fprintf(stderr, "Unable to create EGL context (%x)\n", |
94 | eglGetError()); |
95 | goto out; |
96 | } |
97 | |
98 | eglMakeCurrent(edpy, esfc, esfc, ectxt); |
99 | |
100 | glEnable(GL_TEXTURE_2D); |
101 | |
102 | glGenTextures(1, &texture_name); |
103 | |
104 | glBindTexture(GL_TEXTURE_2D, texture_name); |
105 | |
106 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1024, 512, 0, GL_RGB, |
107 | GL_UNSIGNED_SHORT_5_6_5, tmp_texture_mem); |
108 | if (gl_have_error("glTexImage2D")) |
109 | goto out; |
110 | |
111 | // no mipmaps |
112 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
113 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
114 | |
115 | //glViewport(0, 0, 512, 512); |
116 | glLoadIdentity(); |
117 | glFrontFace(GL_CW); |
118 | glEnable(GL_CULL_FACE); |
119 | |
120 | glEnableClientState(GL_TEXTURE_COORD_ARRAY); |
121 | glEnableClientState(GL_VERTEX_ARRAY); |
122 | |
123 | if (gl_have_error("init")) |
124 | goto out; |
125 | |
6fd09356 |
126 | gl_es_display = (void *)edpy; |
127 | gl_es_surface = (void *)esfc; |
b9801854 |
128 | retval = 0; |
129 | out: |
130 | free(tmp_texture_mem); |
131 | return retval; |
132 | } |
133 | |
134 | static float vertices[] = { |
135 | -1.0f, 1.0f, 0.0f, // 0 0 1 |
136 | 1.0f, 1.0f, 0.0f, // 1 ^ |
137 | -1.0f, -1.0f, 0.0f, // 2 | 2 3 |
138 | 1.0f, -1.0f, 0.0f, // 3 +--> |
139 | }; |
140 | |
141 | static float texture[] = { |
142 | 0.0f, 0.0f, // we flip this: |
143 | 1.0f, 0.0f, // v^ |
144 | 0.0f, 1.0f, // | u |
145 | 1.0f, 1.0f, // +--> |
146 | }; |
147 | |
148 | int gl_flip(const void *fb, int w, int h) |
149 | { |
150 | static int old_w, old_h; |
151 | |
e54719ef |
152 | if (fb != NULL) { |
153 | if (w != old_w || h != old_h) { |
154 | float f_w = (float)w / 1024.0f; |
155 | float f_h = (float)h / 512.0f; |
156 | texture[1*2 + 0] = f_w; |
157 | texture[2*2 + 1] = f_h; |
158 | texture[3*2 + 0] = f_w; |
159 | texture[3*2 + 1] = f_h; |
160 | old_w = w; |
161 | old_h = h; |
162 | } |
163 | |
164 | glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, |
165 | GL_RGB, GL_UNSIGNED_SHORT_5_6_5, fb); |
166 | if (gl_have_error("glTexSubImage2D")) |
167 | return -1; |
b9801854 |
168 | } |
169 | |
b9801854 |
170 | glVertexPointer(3, GL_FLOAT, 0, vertices); |
171 | glTexCoordPointer(2, GL_FLOAT, 0, texture); |
172 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
173 | |
174 | if (gl_have_error("glDrawArrays")) |
175 | return -1; |
176 | |
177 | eglSwapBuffers(edpy, esfc); |
178 | if (gles_have_error("eglSwapBuffers")) |
179 | return -1; |
180 | |
181 | return 0; |
182 | } |
183 | |
184 | void gl_finish(void) |
185 | { |
186 | eglMakeCurrent(edpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); |
187 | eglDestroyContext(edpy, ectxt); |
188 | ectxt = EGL_NO_CONTEXT; |
189 | eglDestroySurface(edpy, esfc); |
190 | esfc = EGL_NO_SURFACE; |
191 | eglTerminate(edpy); |
192 | edpy = EGL_NO_DISPLAY; |
0d645bc5 |
193 | |
6fd09356 |
194 | gl_es_display = (void *)edpy; |
195 | gl_es_surface = (void *)esfc; |
196 | |
0d645bc5 |
197 | gl_platform_finish(); |
b9801854 |
198 | } |