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/osdep.h" 28 #include "ui/console.h" 29 #include "ui/shader.h" 30 31 /* ---------------------------------------------------------------------- */ 32 33 bool console_gl_check_format(DisplayChangeListener *dcl, 34 pixman_format_code_t format) 35 { 36 switch (format) { 37 case PIXMAN_BE_b8g8r8x8: 38 case PIXMAN_BE_b8g8r8a8: 39 case PIXMAN_r5g6b5: 40 return true; 41 default: 42 return false; 43 } 44 } 45 46 void surface_gl_create_texture(QemuGLShader *gls, 47 DisplaySurface *surface) 48 { 49 assert(gls); 50 assert(QEMU_IS_ALIGNED(surface_stride(surface), surface_bytes_per_pixel(surface))); 51 52 if (surface->texture) { 53 return; 54 } 55 56 switch (surface_format(surface)) { 57 case PIXMAN_BE_b8g8r8x8: 58 case PIXMAN_BE_b8g8r8a8: 59 surface->glformat = GL_BGRA_EXT; 60 surface->gltype = GL_UNSIGNED_BYTE; 61 break; 62 case PIXMAN_BE_x8r8g8b8: 63 case PIXMAN_BE_a8r8g8b8: 64 surface->glformat = GL_RGBA; 65 surface->gltype = GL_UNSIGNED_BYTE; 66 break; 67 case PIXMAN_r5g6b5: 68 surface->glformat = GL_RGB; 69 surface->gltype = GL_UNSIGNED_SHORT_5_6_5; 70 break; 71 default: 72 g_assert_not_reached(); 73 } 74 75 glGenTextures(1, &surface->texture); 76 glEnable(GL_TEXTURE_2D); 77 glBindTexture(GL_TEXTURE_2D, surface->texture); 78 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 79 surface_stride(surface) / surface_bytes_per_pixel(surface)); 80 if (epoxy_is_desktop_gl()) { 81 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 82 surface_width(surface), 83 surface_height(surface), 84 0, surface->glformat, surface->gltype, 85 surface_data(surface)); 86 } else { 87 glTexImage2D(GL_TEXTURE_2D, 0, surface->glformat, 88 surface_width(surface), 89 surface_height(surface), 90 0, surface->glformat, surface->gltype, 91 surface_data(surface)); 92 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_ONE); 93 } 94 95 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 96 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 97 } 98 99 void surface_gl_update_texture(QemuGLShader *gls, 100 DisplaySurface *surface, 101 int x, int y, int w, int h) 102 { 103 uint8_t *data = (void *)surface_data(surface); 104 105 assert(gls); 106 107 if (surface->texture) { 108 glBindTexture(GL_TEXTURE_2D, surface->texture); 109 glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 110 surface_stride(surface) 111 / surface_bytes_per_pixel(surface)); 112 glTexSubImage2D(GL_TEXTURE_2D, 0, 113 x, y, w, h, 114 surface->glformat, surface->gltype, 115 data + surface_stride(surface) * y 116 + surface_bytes_per_pixel(surface) * x); 117 } 118 } 119 120 void surface_gl_render_texture(QemuGLShader *gls, 121 DisplaySurface *surface) 122 { 123 assert(gls); 124 125 glClearColor(0.1f, 0.1f, 0.1f, 0.0f); 126 glClear(GL_COLOR_BUFFER_BIT); 127 128 qemu_gl_run_texture_blit(gls, false); 129 } 130 131 void surface_gl_destroy_texture(QemuGLShader *gls, 132 DisplaySurface *surface) 133 { 134 if (!surface || !surface->texture) { 135 return; 136 } 137 glDeleteTextures(1, &surface->texture); 138 surface->texture = 0; 139 } 140 141 void surface_gl_setup_viewport(QemuGLShader *gls, 142 DisplaySurface *surface, 143 int ww, int wh) 144 { 145 int gw, gh, stripe; 146 float sw, sh; 147 148 assert(gls); 149 150 gw = surface_width(surface); 151 gh = surface_height(surface); 152 153 sw = (float)ww/gw; 154 sh = (float)wh/gh; 155 if (sw < sh) { 156 stripe = wh - wh*sw/sh; 157 glViewport(0, stripe / 2, ww, wh - stripe); 158 } else { 159 stripe = ww - ww*sh/sw; 160 glViewport(stripe / 2, 0, ww - stripe, wh); 161 } 162 } 163