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