Gerd Hoffmann | cd2bc88 | 2015-01-09 11:40:23 +0100 | [diff] [blame] | 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 | } |