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