1 /* 2 * QEMU graphical console -- opengl helper bits 3 * 4 * Copyright (c) 2014 Red Hat 5 * 6 * Authors: 7 * Gerd Hoffmann <kraxel@redhat.com> 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a copy 10 * of this software and associated documentation files (the "Software"), to deal 11 * in the Software without restriction, including without limitation the rights 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 13 * copies of the Software, and to permit persons to whom the Software is 14 * furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 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 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 25 * THE SOFTWARE. 26 */ 27 #include "qemu-common.h" 28 #include "ui/console.h" 29 #include "ui/shader.h" 30 31 #include "shader/texture-blit-vert.h" 32 #include "shader/texture-blit-frag.h" 33 34 struct ConsoleGLState { 35 GLint texture_blit_prog; 36 GLint texture_blit_vao; 37 }; 38 39 /* ---------------------------------------------------------------------- */ 40 41 ConsoleGLState *console_gl_init_context(void) 42 { 43 ConsoleGLState *gls = g_new0(ConsoleGLState, 1); 44 45 gls->texture_blit_prog = qemu_gl_create_compile_link_program 46 (texture_blit_vert_src, texture_blit_frag_src); 47 if (!gls->texture_blit_prog) { 48 exit(1); 49 } 50 51 gls->texture_blit_vao = 52 qemu_gl_init_texture_blit(gls->texture_blit_prog); 53 54 return gls; 55 } 56 57 void console_gl_fini_context(ConsoleGLState *gls) 58 { 59 if (!gls) { 60 return; 61 } 62 g_free(gls); 63 } 64 65 bool console_gl_check_format(DisplayChangeListener *dcl, 66 pixman_format_code_t format) 67 { 68 switch (format) { 69 case PIXMAN_BE_b8g8r8x8: 70 case PIXMAN_BE_b8g8r8a8: 71 case PIXMAN_r5g6b5: 72 return true; 73 default: 74 return false; 75 } 76 } 77 78 void surface_gl_create_texture(ConsoleGLState *gls, 79 DisplaySurface *surface) 80 { 81 assert(gls); 82 assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0); 83 84 switch (surface->format) { 85 case PIXMAN_BE_b8g8r8x8: 86 case PIXMAN_BE_b8g8r8a8: 87 surface->glformat = GL_BGRA_EXT; 88 surface->gltype = GL_UNSIGNED_BYTE; 89 break; 90 case PIXMAN_r5g6b5: 91 surface->glformat = GL_RGB; 92 surface->gltype = GL_UNSIGNED_SHORT_5_6_5; 93 break; 94 default: 95 g_assert_not_reached(); 96 } 97 98 glGenTextures(1, &surface->texture); 99 glEnable(GL_TEXTURE_2D); 100 glBindTexture(GL_TEXTURE_2D, surface->texture); 101 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 102 surface_stride(surface) / surface_bytes_per_pixel(surface)); 103 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 104 surface_width(surface), 105 surface_height(surface), 106 0, surface->glformat, surface->gltype, 107 surface_data(surface)); 108 109 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 110 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 111 } 112 113 void surface_gl_update_texture(ConsoleGLState *gls, 114 DisplaySurface *surface, 115 int x, int y, int w, int h) 116 { 117 uint8_t *data = (void *)surface_data(surface); 118 119 assert(gls); 120 121 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 122 surface_stride(surface) / surface_bytes_per_pixel(surface)); 123 glTexSubImage2D(GL_TEXTURE_2D, 0, 124 x, y, w, h, 125 surface->glformat, surface->gltype, 126 data + surface_stride(surface) * y 127 + surface_bytes_per_pixel(surface) * x); 128 } 129 130 void surface_gl_render_texture(ConsoleGLState *gls, 131 DisplaySurface *surface) 132 { 133 assert(gls); 134 135 glClearColor(0.1f, 0.1f, 0.1f, 0.0f); 136 glClear(GL_COLOR_BUFFER_BIT); 137 138 qemu_gl_run_texture_blit(gls->texture_blit_prog, 139 gls->texture_blit_vao); 140 } 141 142 void surface_gl_destroy_texture(ConsoleGLState *gls, 143 DisplaySurface *surface) 144 { 145 if (!surface || !surface->texture) { 146 return; 147 } 148 glDeleteTextures(1, &surface->texture); 149 surface->texture = 0; 150 } 151 152 void surface_gl_setup_viewport(ConsoleGLState *gls, 153 DisplaySurface *surface, 154 int ww, int wh) 155 { 156 int gw, gh, stripe; 157 float sw, sh; 158 159 assert(gls); 160 161 gw = surface_width(surface); 162 gh = surface_height(surface); 163 164 sw = (float)ww/gw; 165 sh = (float)wh/gh; 166 if (sw < sh) { 167 stripe = wh - wh*sw/sh; 168 glViewport(0, stripe / 2, ww, wh - stripe); 169 } else { 170 stripe = ww - ww*sh/sw; 171 glViewport(stripe / 2, 0, ww - stripe, wh); 172 } 173 } 174