2 * QEMU graphical console -- opengl helper bits
4 * Copyright (c) 2014 Red Hat
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10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
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13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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27 #include "qemu/osdep.h"
28 #include "qemu-common.h"
29 #include "ui/console.h"
30 #include "ui/shader.h"
32 #include "shader/texture-blit-vert.h"
33 #include "shader/texture-blit-frag.h"
35 struct ConsoleGLState {
36 GLint texture_blit_prog;
37 GLint texture_blit_vao;
40 /* ---------------------------------------------------------------------- */
42 ConsoleGLState *console_gl_init_context(void)
44 ConsoleGLState *gls = g_new0(ConsoleGLState, 1);
46 gls->texture_blit_prog = qemu_gl_create_compile_link_program
47 (texture_blit_vert_src, texture_blit_frag_src);
48 if (!gls->texture_blit_prog) {
52 gls->texture_blit_vao =
53 qemu_gl_init_texture_blit(gls->texture_blit_prog);
58 void console_gl_fini_context(ConsoleGLState *gls)
66 bool console_gl_check_format(DisplayChangeListener *dcl,
67 pixman_format_code_t format)
70 case PIXMAN_BE_b8g8r8x8:
71 case PIXMAN_BE_b8g8r8a8:
79 void surface_gl_create_texture(ConsoleGLState *gls,
80 DisplaySurface *surface)
83 assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0);
85 switch (surface->format) {
86 case PIXMAN_BE_b8g8r8x8:
87 case PIXMAN_BE_b8g8r8a8:
88 surface->glformat = GL_BGRA_EXT;
89 surface->gltype = GL_UNSIGNED_BYTE;
92 surface->glformat = GL_RGB;
93 surface->gltype = GL_UNSIGNED_SHORT_5_6_5;
96 g_assert_not_reached();
99 glGenTextures(1, &surface->texture);
100 glEnable(GL_TEXTURE_2D);
101 glBindTexture(GL_TEXTURE_2D, surface->texture);
102 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
103 surface_stride(surface) / surface_bytes_per_pixel(surface));
104 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
105 surface_width(surface),
106 surface_height(surface),
107 0, surface->glformat, surface->gltype,
108 surface_data(surface));
110 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
111 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
114 void surface_gl_update_texture(ConsoleGLState *gls,
115 DisplaySurface *surface,
116 int x, int y, int w, int h)
118 uint8_t *data = (void *)surface_data(surface);
122 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
123 surface_stride(surface) / surface_bytes_per_pixel(surface));
124 glTexSubImage2D(GL_TEXTURE_2D, 0,
126 surface->glformat, surface->gltype,
127 data + surface_stride(surface) * y
128 + surface_bytes_per_pixel(surface) * x);
131 void surface_gl_render_texture(ConsoleGLState *gls,
132 DisplaySurface *surface)
136 glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
137 glClear(GL_COLOR_BUFFER_BIT);
139 qemu_gl_run_texture_blit(gls->texture_blit_prog,
140 gls->texture_blit_vao);
143 void surface_gl_destroy_texture(ConsoleGLState *gls,
144 DisplaySurface *surface)
146 if (!surface || !surface->texture) {
149 glDeleteTextures(1, &surface->texture);
150 surface->texture = 0;
153 void surface_gl_setup_viewport(ConsoleGLState *gls,
154 DisplaySurface *surface,
162 gw = surface_width(surface);
163 gh = surface_height(surface);
168 stripe = wh - wh*sw/sh;
169 glViewport(0, stripe / 2, ww, wh - stripe);
171 stripe = ww - ww*sh/sw;
172 glViewport(stripe / 2, 0, ww - stripe, wh);