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 }; 37 38 /* ---------------------------------------------------------------------- */ 39 40 ConsoleGLState *console_gl_init_context(void) 41 { 42 ConsoleGLState *gls = g_new0(ConsoleGLState, 1); 43 44 gls->texture_blit_prog = qemu_gl_create_compile_link_program 45 (texture_blit_vert_src, texture_blit_frag_src); 46 if (!gls->texture_blit_prog) { 47 exit(1); 48 } 49 50 return gls; 51 } 52 53 void console_gl_fini_context(ConsoleGLState *gls) 54 { 55 if (!gls) { 56 return; 57 } 58 g_free(gls); 59 } 60 61 bool console_gl_check_format(DisplayChangeListener *dcl, 62 pixman_format_code_t format) 63 { 64 switch (format) { 65 case PIXMAN_BE_b8g8r8x8: 66 case PIXMAN_BE_b8g8r8a8: 67 case PIXMAN_r5g6b5: 68 return true; 69 default: 70 return false; 71 } 72 } 73 74 void surface_gl_create_texture(ConsoleGLState *gls, 75 DisplaySurface *surface) 76 { 77 assert(gls); 78 assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0); 79 80 switch (surface->format) { 81 case PIXMAN_BE_b8g8r8x8: 82 case PIXMAN_BE_b8g8r8a8: 83 surface->glformat = GL_BGRA_EXT; 84 surface->gltype = GL_UNSIGNED_BYTE; 85 break; 86 case PIXMAN_r5g6b5: 87 surface->glformat = GL_RGB; 88 surface->gltype = GL_UNSIGNED_SHORT_5_6_5; 89 break; 90 default: 91 g_assert_not_reached(); 92 } 93 94 glGenTextures(1, &surface->texture); 95 glEnable(GL_TEXTURE_2D); 96 glBindTexture(GL_TEXTURE_2D, surface->texture); 97 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 98 surface_stride(surface) / surface_bytes_per_pixel(surface)); 99 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 100 surface_width(surface), 101 surface_height(surface), 102 0, surface->glformat, surface->gltype, 103 surface_data(surface)); 104 105 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 106 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 107 } 108 109 void surface_gl_update_texture(ConsoleGLState *gls, 110 DisplaySurface *surface, 111 int x, int y, int w, int h) 112 { 113 uint8_t *data = (void *)surface_data(surface); 114 115 assert(gls); 116 117 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 118 surface_stride(surface) / surface_bytes_per_pixel(surface)); 119 glTexSubImage2D(GL_TEXTURE_2D, 0, 120 x, y, w, h, 121 surface->glformat, surface->gltype, 122 data + surface_stride(surface) * y 123 + surface_bytes_per_pixel(surface) * x); 124 } 125 126 void surface_gl_render_texture(ConsoleGLState *gls, 127 DisplaySurface *surface) 128 { 129 assert(gls); 130 131 glClearColor(0.1f, 0.1f, 0.1f, 0.0f); 132 glClear(GL_COLOR_BUFFER_BIT); 133 134 qemu_gl_run_texture_blit(gls->texture_blit_prog); 135 } 136 137 void surface_gl_destroy_texture(ConsoleGLState *gls, 138 DisplaySurface *surface) 139 { 140 if (!surface || !surface->texture) { 141 return; 142 } 143 glDeleteTextures(1, &surface->texture); 144 surface->texture = 0; 145 } 146 147 void surface_gl_setup_viewport(ConsoleGLState *gls, 148 DisplaySurface *surface, 149 int ww, int wh) 150 { 151 int gw, gh, stripe; 152 float sw, sh; 153 154 assert(gls); 155 156 gw = surface_width(surface); 157 gh = surface_height(surface); 158 159 sw = (float)ww/gw; 160 sh = (float)wh/gh; 161 if (sw < sh) { 162 stripe = wh - wh*sw/sh; 163 glViewport(0, stripe / 2, ww, wh - stripe); 164 } else { 165 stripe = ww - ww*sh/sw; 166 glViewport(stripe / 2, 0, ww - stripe, wh); 167 } 168 } 169