filename | src/drivers/gl_fbo.c |
changeset | 1251:b8ab59d39756 |
prev | 1245:01e0020adf88 |
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author | nkeynes |
date | Sat Mar 03 16:11:28 2012 +1000 (12 years ago) |
permissions | -rw-r--r-- |
last change | Support depth component 16 as well as 24 (add capability flag for the available bits) Put remaining TODOs inside HAVE_OPENGL_FIXEDFUNC blocks Add swap-buffer calls for EGL (does not appear to support rendering directly to front-buffer) |
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nkeynes@352 | 1 | /** |
nkeynes@561 | 2 | * $Id$ |
nkeynes@352 | 3 | * |
nkeynes@352 | 4 | * GL framebuffer-based driver shell. This requires the EXT_framebuffer_object |
nkeynes@352 | 5 | * extension, but is much nicer/faster/etc than pbuffers when it's available. |
nkeynes@352 | 6 | * This is (optionally) used indirectly by the top-level GLX driver. |
nkeynes@352 | 7 | * |
nkeynes@352 | 8 | * Strategy-wise, we maintain 2 framebuffers with up to 4 target colour |
nkeynes@352 | 9 | * buffers a piece. Effectively this reserves one fb for display output, |
nkeynes@352 | 10 | * and the other for texture output (each fb has a single size). |
nkeynes@352 | 11 | * |
nkeynes@352 | 12 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@352 | 13 | * |
nkeynes@352 | 14 | * This program is free software; you can redistribute it and/or modify |
nkeynes@352 | 15 | * it under the terms of the GNU General Public License as published by |
nkeynes@352 | 16 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@352 | 17 | * (at your option) any later version. |
nkeynes@352 | 18 | * |
nkeynes@352 | 19 | * This program is distributed in the hope that it will be useful, |
nkeynes@352 | 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@352 | 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@352 | 22 | * GNU General Public License for more details. |
nkeynes@352 | 23 | */ |
nkeynes@352 | 24 | |
nkeynes@424 | 25 | #define GL_GLEXT_PROTOTYPES 1 |
nkeynes@424 | 26 | |
nkeynes@477 | 27 | #include <stdlib.h> |
nkeynes@477 | 28 | #include "lxdream.h" |
nkeynes@352 | 29 | #include "display.h" |
nkeynes@635 | 30 | #include "drivers/video_gl.h" |
nkeynes@635 | 31 | #include "pvr2/glutil.h" |
nkeynes@352 | 32 | |
nkeynes@1210 | 33 | #if defined(HAVE_OPENGL_FBO) || defined(HAVE_OPENGL_FBO_EXT) |
nkeynes@656 | 34 | |
nkeynes@352 | 35 | #define MAX_FRAMEBUFFERS 2 |
nkeynes@798 | 36 | #define MAX_TEXTURES_PER_FB 16 |
nkeynes@352 | 37 | |
nkeynes@805 | 38 | static render_buffer_t gl_fbo_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id ); |
nkeynes@352 | 39 | static void gl_fbo_destroy_render_buffer( render_buffer_t buffer ); |
nkeynes@352 | 40 | static gboolean gl_fbo_set_render_target( render_buffer_t buffer ); |
nkeynes@805 | 41 | static void gl_fbo_finish_render( render_buffer_t buffer ); |
nkeynes@669 | 42 | static void gl_fbo_display_render_buffer( render_buffer_t buffer ); |
nkeynes@477 | 43 | static void gl_fbo_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer ); |
nkeynes@669 | 44 | static void gl_fbo_display_blank( uint32_t colour ); |
nkeynes@1166 | 45 | static gboolean gl_fbo_test_framebuffer( ); |
nkeynes@477 | 46 | static gboolean gl_fbo_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format ); |
nkeynes@352 | 47 | |
nkeynes@352 | 48 | extern uint32_t video_width, video_height; |
nkeynes@352 | 49 | |
nkeynes@352 | 50 | /** |
nkeynes@352 | 51 | * Framebuffer info structure |
nkeynes@352 | 52 | */ |
nkeynes@352 | 53 | struct gl_fbo_info { |
nkeynes@352 | 54 | GLuint fb_id; |
nkeynes@352 | 55 | GLuint depth_id; |
nkeynes@352 | 56 | GLuint stencil_id; |
nkeynes@352 | 57 | GLuint tex_ids[MAX_TEXTURES_PER_FB]; |
nkeynes@352 | 58 | int width, height; |
nkeynes@352 | 59 | }; |
nkeynes@352 | 60 | |
nkeynes@798 | 61 | static GLint gl_fbo_max_attachments = 0; |
nkeynes@1251 | 62 | static GLint gl_fbo_depth_component; |
nkeynes@863 | 63 | static gboolean gl_fbo_have_packed_stencil = FALSE; |
nkeynes@352 | 64 | static struct gl_fbo_info fbo[MAX_FRAMEBUFFERS]; |
nkeynes@798 | 65 | |
nkeynes@1210 | 66 | #define ATTACHMENT_POINT(n) (GL_COLOR_ATTACHMENT0+(n)) |
nkeynes@352 | 67 | static int last_used_fbo; |
nkeynes@352 | 68 | |
nkeynes@352 | 69 | gboolean gl_fbo_is_supported() |
nkeynes@352 | 70 | { |
nkeynes@1245 | 71 | return isGLExtensionSupported("GL_EXT_framebuffer_object") || isOpenGLES2(); |
nkeynes@352 | 72 | } |
nkeynes@352 | 73 | |
nkeynes@352 | 74 | /** |
nkeynes@352 | 75 | * Construct the initial frame buffers and allocate ids for everything. |
nkeynes@352 | 76 | * The render handling driver methods are set to the fbo versions. |
nkeynes@352 | 77 | */ |
nkeynes@352 | 78 | void gl_fbo_init( display_driver_t driver ) |
nkeynes@352 | 79 | { |
nkeynes@352 | 80 | int i,j; |
nkeynes@424 | 81 | GLuint fbids[MAX_FRAMEBUFFERS]; |
nkeynes@424 | 82 | GLuint rbids[MAX_FRAMEBUFFERS*2]; /* depth buffer, stencil buffer per fb */ |
nkeynes@736 | 83 | |
nkeynes@1223 | 84 | gl_fbo_max_attachments = glGetMaxColourAttachments(); |
nkeynes@1210 | 85 | glGenFramebuffers( MAX_FRAMEBUFFERS, &fbids[0] ); |
nkeynes@1210 | 86 | glGenRenderbuffers( MAX_FRAMEBUFFERS*2, &rbids[0] ); |
nkeynes@352 | 87 | for( i=0; i<MAX_FRAMEBUFFERS; i++ ) { |
nkeynes@736 | 88 | fbo[i].fb_id = fbids[i]; |
nkeynes@736 | 89 | fbo[i].depth_id = rbids[i*2]; |
nkeynes@736 | 90 | fbo[i].stencil_id = rbids[i*2+1]; |
nkeynes@736 | 91 | fbo[i].width = -1; |
nkeynes@736 | 92 | fbo[i].height = -1; |
nkeynes@736 | 93 | for( j=0; j<MAX_TEXTURES_PER_FB; j++ ) { |
nkeynes@736 | 94 | fbo[i].tex_ids[j] = -1; |
nkeynes@736 | 95 | } |
nkeynes@352 | 96 | } |
nkeynes@352 | 97 | last_used_fbo = 0; |
nkeynes@352 | 98 | |
nkeynes@863 | 99 | if( isGLExtensionSupported("GL_EXT_packed_depth_stencil" ) ) { |
nkeynes@863 | 100 | driver->capabilities.stencil_bits = 8; |
nkeynes@863 | 101 | gl_fbo_have_packed_stencil = TRUE; |
nkeynes@863 | 102 | } else { |
nkeynes@863 | 103 | driver->capabilities.stencil_bits = 0; |
nkeynes@863 | 104 | gl_fbo_have_packed_stencil = FALSE; |
nkeynes@863 | 105 | WARN( "Packed depth stencil not available - disabling shadow volumes" ); |
nkeynes@863 | 106 | } |
nkeynes@1251 | 107 | if( driver->capabilities.depth_bits >= 24 ) { |
nkeynes@1251 | 108 | gl_fbo_depth_component = GL_DEPTH_COMPONENT24; |
nkeynes@1251 | 109 | } else { |
nkeynes@1251 | 110 | gl_fbo_depth_component = GL_DEPTH_COMPONENT16; |
nkeynes@1251 | 111 | } |
nkeynes@863 | 112 | |
nkeynes@352 | 113 | driver->create_render_buffer = gl_fbo_create_render_buffer; |
nkeynes@352 | 114 | driver->destroy_render_buffer = gl_fbo_destroy_render_buffer; |
nkeynes@352 | 115 | driver->set_render_target = gl_fbo_set_render_target; |
nkeynes@805 | 116 | driver->finish_render = gl_fbo_finish_render; |
nkeynes@352 | 117 | driver->display_render_buffer = gl_fbo_display_render_buffer; |
nkeynes@477 | 118 | driver->load_frame_buffer = gl_fbo_load_frame_buffer; |
nkeynes@352 | 119 | driver->display_blank = gl_fbo_display_blank; |
nkeynes@352 | 120 | driver->read_render_buffer = gl_fbo_read_render_buffer; |
nkeynes@445 | 121 | |
nkeynes@1166 | 122 | gl_fbo_test_framebuffer(); |
nkeynes@1210 | 123 | glBindFramebuffer(GL_FRAMEBUFFER, 0); |
nkeynes@352 | 124 | } |
nkeynes@352 | 125 | |
nkeynes@352 | 126 | void gl_fbo_shutdown() |
nkeynes@352 | 127 | { |
nkeynes@352 | 128 | int i; |
nkeynes@1210 | 129 | glBindFramebuffer( GL_FRAMEBUFFER, 0 ); |
nkeynes@352 | 130 | for( i=0; i<MAX_FRAMEBUFFERS; i++ ) { |
nkeynes@1210 | 131 | glDeleteFramebuffers( 1, &fbo[i].fb_id ); |
nkeynes@1210 | 132 | glDeleteRenderbuffers( 2, &fbo[i].depth_id ); |
nkeynes@352 | 133 | } |
nkeynes@352 | 134 | } |
nkeynes@352 | 135 | |
nkeynes@863 | 136 | static void gl_fbo_setup_framebuffer( int bufno, int width, int height ) |
nkeynes@352 | 137 | { |
nkeynes@877 | 138 | int i; |
nkeynes@1210 | 139 | glBindFramebuffer(GL_FRAMEBUFFER, fbo[bufno].fb_id); |
nkeynes@877 | 140 | |
nkeynes@877 | 141 | /* Clear out any existing texture attachments */ |
nkeynes@877 | 142 | for( i=0; i<gl_fbo_max_attachments; i++ ) { |
nkeynes@877 | 143 | if( fbo[bufno].tex_ids[i] != -1 ) { |
nkeynes@1210 | 144 | glFramebufferTexture2D(GL_FRAMEBUFFER, ATTACHMENT_POINT(i), |
nkeynes@1222 | 145 | GL_TEXTURE_2D, 0, 0); |
nkeynes@877 | 146 | fbo[bufno].tex_ids[i] = -1; |
nkeynes@877 | 147 | } |
nkeynes@877 | 148 | } |
nkeynes@877 | 149 | |
nkeynes@877 | 150 | /* Setup the renderbuffers */ |
nkeynes@863 | 151 | if( gl_fbo_have_packed_stencil ) { |
nkeynes@1210 | 152 | glBindRenderbuffer(GL_RENDERBUFFER, fbo[bufno].depth_id); |
nkeynes@1222 | 153 | glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height); |
nkeynes@1210 | 154 | glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, |
nkeynes@1210 | 155 | GL_RENDERBUFFER, fbo[bufno].depth_id); |
nkeynes@1210 | 156 | glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, |
nkeynes@1210 | 157 | GL_RENDERBUFFER, fbo[bufno].depth_id); |
nkeynes@863 | 158 | } else { |
nkeynes@1210 | 159 | glBindRenderbuffer(GL_RENDERBUFFER, fbo[bufno].depth_id); |
nkeynes@1251 | 160 | glRenderbufferStorage(GL_RENDERBUFFER, gl_fbo_depth_component, width, height); |
nkeynes@1210 | 161 | glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, |
nkeynes@1210 | 162 | GL_RENDERBUFFER, fbo[bufno].depth_id); |
nkeynes@863 | 163 | /* In theory you could attach a separate stencil buffer. In practice this |
nkeynes@863 | 164 | * isn't actually supported by any hardware I've had access to, so we're |
nkeynes@863 | 165 | * stencil-less. |
nkeynes@863 | 166 | */ |
nkeynes@863 | 167 | } |
nkeynes@352 | 168 | fbo[bufno].width = width; |
nkeynes@352 | 169 | fbo[bufno].height = height; |
nkeynes@352 | 170 | } |
nkeynes@352 | 171 | |
nkeynes@863 | 172 | static int gl_fbo_get_framebuffer( int width, int height ) |
nkeynes@352 | 173 | { |
nkeynes@352 | 174 | int bufno = -1, i; |
nkeynes@352 | 175 | /* find a compatible framebuffer context */ |
nkeynes@352 | 176 | for( i=0; i<MAX_FRAMEBUFFERS; i++ ) { |
nkeynes@736 | 177 | if( fbo[i].width == -1 && bufno == -1 ) { |
nkeynes@736 | 178 | bufno = i; |
nkeynes@736 | 179 | } else if( fbo[i].width == width && fbo[i].height == height ) { |
nkeynes@736 | 180 | bufno = i; |
nkeynes@736 | 181 | break; |
nkeynes@736 | 182 | } |
nkeynes@352 | 183 | } |
nkeynes@352 | 184 | if( bufno == -1 ) { |
nkeynes@736 | 185 | bufno = last_used_fbo + 1; |
nkeynes@877 | 186 | if( bufno >= MAX_FRAMEBUFFERS ) { |
nkeynes@736 | 187 | bufno = 0; |
nkeynes@736 | 188 | } |
nkeynes@736 | 189 | last_used_fbo = bufno; |
nkeynes@352 | 190 | } |
nkeynes@352 | 191 | if( fbo[bufno].width == width && fbo[bufno].height == height ) { |
nkeynes@1210 | 192 | glBindFramebuffer( GL_FRAMEBUFFER, fbo[bufno].fb_id ); |
nkeynes@352 | 193 | } else { |
nkeynes@736 | 194 | gl_fbo_setup_framebuffer( bufno, width, height ); |
nkeynes@352 | 195 | } |
nkeynes@352 | 196 | return bufno; |
nkeynes@352 | 197 | } |
nkeynes@352 | 198 | |
nkeynes@352 | 199 | /** |
nkeynes@352 | 200 | * Attach a texture to the framebuffer. The texture must already be initialized |
nkeynes@352 | 201 | * to the correct dimensions etc. |
nkeynes@352 | 202 | */ |
nkeynes@352 | 203 | static GLint gl_fbo_attach_texture( int fbo_no, GLint tex_id ) { |
nkeynes@352 | 204 | int attach = -1, i; |
nkeynes@798 | 205 | for( i=0; i<gl_fbo_max_attachments; i++ ) { |
nkeynes@736 | 206 | if( fbo[fbo_no].tex_ids[i] == tex_id ) { |
nkeynes@1228 | 207 | #ifdef HAVE_OPENGL_DRAW_BUFFER |
nkeynes@798 | 208 | glDrawBuffer(ATTACHMENT_POINT(i)); |
nkeynes@798 | 209 | glReadBuffer(ATTACHMENT_POINT(i)); |
nkeynes@1228 | 210 | #endif |
nkeynes@798 | 211 | return ATTACHMENT_POINT(i); // already attached |
nkeynes@736 | 212 | } else if( fbo[fbo_no].tex_ids[i] == -1 && attach == -1 ) { |
nkeynes@736 | 213 | attach = i; |
nkeynes@736 | 214 | } |
nkeynes@352 | 215 | } |
nkeynes@352 | 216 | if( attach == -1 ) { |
nkeynes@736 | 217 | attach = 0; |
nkeynes@352 | 218 | } |
nkeynes@352 | 219 | fbo[fbo_no].tex_ids[attach] = tex_id; |
nkeynes@1222 | 220 | glBindTexture( GL_TEXTURE_2D, 0 ); // Ensure the output texture is unbound |
nkeynes@1210 | 221 | glFramebufferTexture2D(GL_FRAMEBUFFER, ATTACHMENT_POINT(attach), |
nkeynes@1222 | 222 | GL_TEXTURE_2D, tex_id, 0 ); |
nkeynes@352 | 223 | /* Set draw/read buffers by default */ |
nkeynes@1228 | 224 | #ifdef HAVE_OPENGL_DRAW_BUFFER |
nkeynes@798 | 225 | glDrawBuffer(ATTACHMENT_POINT(attach)); |
nkeynes@798 | 226 | glReadBuffer(ATTACHMENT_POINT(attach)); |
nkeynes@1228 | 227 | #endif |
nkeynes@352 | 228 | |
nkeynes@1166 | 229 | return ATTACHMENT_POINT(attach); |
nkeynes@1166 | 230 | } |
nkeynes@352 | 231 | |
nkeynes@1166 | 232 | static gboolean gl_fbo_test_framebuffer( ) |
nkeynes@1166 | 233 | { |
nkeynes@1166 | 234 | gboolean result = TRUE; |
nkeynes@1166 | 235 | glGetError(); /* Clear error state just in case */ |
nkeynes@1166 | 236 | render_buffer_t buffer = gl_fbo_create_render_buffer( 640, 480, 0 ); |
nkeynes@1166 | 237 | gl_fbo_set_render_target(buffer); |
nkeynes@1166 | 238 | |
nkeynes@1210 | 239 | GLint status = glCheckFramebufferStatus(GL_FRAMEBUFFER); |
nkeynes@1210 | 240 | if( status != GL_FRAMEBUFFER_COMPLETE ) { |
nkeynes@736 | 241 | ERROR( "Framebuffer failure: %x", status ); |
nkeynes@1166 | 242 | result = FALSE; |
nkeynes@1166 | 243 | } |
nkeynes@1166 | 244 | if( result ) { |
nkeynes@1166 | 245 | result = gl_check_error( "Setting up framebuffer" ); |
nkeynes@352 | 246 | } |
nkeynes@352 | 247 | |
nkeynes@1166 | 248 | gl_fbo_destroy_render_buffer( buffer ); |
nkeynes@1166 | 249 | return result; |
nkeynes@352 | 250 | } |
nkeynes@352 | 251 | |
nkeynes@805 | 252 | static render_buffer_t gl_fbo_create_render_buffer( uint32_t width, uint32_t height, GLuint tex_id ) |
nkeynes@352 | 253 | { |
nkeynes@352 | 254 | render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 ); |
nkeynes@352 | 255 | buffer->width = width; |
nkeynes@352 | 256 | buffer->height = height; |
nkeynes@805 | 257 | buffer->tex_id = tex_id; |
nkeynes@805 | 258 | if( tex_id == 0 ) { |
nkeynes@805 | 259 | GLuint tex; |
nkeynes@805 | 260 | glGenTextures( 1, &tex ); |
nkeynes@805 | 261 | buffer->buf_id = tex; |
nkeynes@805 | 262 | } else { |
nkeynes@805 | 263 | buffer->buf_id = tex_id; |
nkeynes@1222 | 264 | glBindTexture( GL_TEXTURE_2D, tex_id ); |
nkeynes@805 | 265 | } |
nkeynes@1222 | 266 | glBindTexture( GL_TEXTURE_2D, buffer->buf_id ); |
nkeynes@1222 | 267 | glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL ); |
nkeynes@1223 | 268 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE ); |
nkeynes@1223 | 269 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE ); |
nkeynes@1222 | 270 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); |
nkeynes@1222 | 271 | glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); |
nkeynes@352 | 272 | return buffer; |
nkeynes@352 | 273 | } |
nkeynes@352 | 274 | |
nkeynes@805 | 275 | /** |
nkeynes@805 | 276 | * Ensure the texture in the given render buffer is not attached to a |
nkeynes@805 | 277 | * framebuffer (ie, so we can safely use it as a texture during the rendering |
nkeynes@805 | 278 | * cycle, or before deletion). |
nkeynes@805 | 279 | */ |
nkeynes@805 | 280 | static void gl_fbo_detach_render_buffer( render_buffer_t buffer ) |
nkeynes@805 | 281 | { |
nkeynes@805 | 282 | int i,j; |
nkeynes@805 | 283 | for( i=0; i<MAX_FRAMEBUFFERS; i++ ) { |
nkeynes@805 | 284 | if( fbo[i].width == buffer->width && fbo[i].height == buffer->height ) { |
nkeynes@805 | 285 | for( j=0; j<gl_fbo_max_attachments; j++ ) { |
nkeynes@805 | 286 | if( fbo[i].tex_ids[j] == buffer->buf_id ) { |
nkeynes@1210 | 287 | glBindFramebuffer(GL_FRAMEBUFFER, fbo[i].fb_id); |
nkeynes@1210 | 288 | glFramebufferTexture2D(GL_FRAMEBUFFER, ATTACHMENT_POINT(j), |
nkeynes@1222 | 289 | GL_TEXTURE_2D, GL_NONE, 0 ); |
nkeynes@805 | 290 | fbo[i].tex_ids[j] = -1; |
nkeynes@805 | 291 | return; |
nkeynes@805 | 292 | } |
nkeynes@805 | 293 | } |
nkeynes@805 | 294 | break; |
nkeynes@805 | 295 | } |
nkeynes@805 | 296 | } |
nkeynes@805 | 297 | } |
nkeynes@805 | 298 | |
nkeynes@352 | 299 | static void gl_fbo_destroy_render_buffer( render_buffer_t buffer ) |
nkeynes@352 | 300 | { |
nkeynes@352 | 301 | int i,j; |
nkeynes@805 | 302 | |
nkeynes@805 | 303 | gl_fbo_detach_render_buffer( buffer ); |
nkeynes@805 | 304 | |
nkeynes@805 | 305 | if( buffer->buf_id != buffer->tex_id ) { |
nkeynes@805 | 306 | // If tex_id was set at buffer creation, we don't own the texture. |
nkeynes@805 | 307 | // Otherwise, delete it now. |
nkeynes@805 | 308 | GLuint tex = buffer->buf_id; |
nkeynes@805 | 309 | glDeleteTextures( 1, &tex ); |
nkeynes@352 | 310 | } |
nkeynes@352 | 311 | buffer->buf_id = 0; |
nkeynes@805 | 312 | buffer->tex_id = 0; |
nkeynes@352 | 313 | free( buffer ); |
nkeynes@352 | 314 | } |
nkeynes@352 | 315 | |
nkeynes@352 | 316 | static gboolean gl_fbo_set_render_target( render_buffer_t buffer ) |
nkeynes@352 | 317 | { |
nkeynes@352 | 318 | int fb = gl_fbo_get_framebuffer( buffer->width, buffer->height ); |
nkeynes@424 | 319 | gl_fbo_attach_texture( fb, buffer->buf_id ); |
nkeynes@352 | 320 | /* setup the gl context */ |
nkeynes@352 | 321 | glViewport( 0, 0, buffer->width, buffer->height ); |
nkeynes@736 | 322 | |
nkeynes@352 | 323 | return TRUE; |
nkeynes@352 | 324 | } |
nkeynes@352 | 325 | |
nkeynes@805 | 326 | static void gl_fbo_finish_render( render_buffer_t buffer ) |
nkeynes@805 | 327 | { |
nkeynes@805 | 328 | glFinish(); |
nkeynes@805 | 329 | gl_fbo_detach_render_buffer(buffer); |
nkeynes@805 | 330 | } |
nkeynes@805 | 331 | |
nkeynes@352 | 332 | /** |
nkeynes@352 | 333 | * Render the texture holding the given buffer to the front window |
nkeynes@352 | 334 | * buffer. |
nkeynes@352 | 335 | */ |
nkeynes@669 | 336 | static void gl_fbo_display_render_buffer( render_buffer_t buffer ) |
nkeynes@352 | 337 | { |
nkeynes@477 | 338 | gl_fbo_detach(); |
nkeynes@477 | 339 | gl_display_render_buffer( buffer ); |
nkeynes@1251 | 340 | if( display_driver->swap_buffers ) |
nkeynes@1251 | 341 | display_driver->swap_buffers(); |
nkeynes@352 | 342 | } |
nkeynes@352 | 343 | |
nkeynes@477 | 344 | static void gl_fbo_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer ) |
nkeynes@477 | 345 | { |
nkeynes@477 | 346 | gl_fbo_detach(); |
nkeynes@545 | 347 | gl_load_frame_buffer( frame, buffer->buf_id ); |
nkeynes@477 | 348 | } |
nkeynes@477 | 349 | |
nkeynes@669 | 350 | static void gl_fbo_display_blank( uint32_t colour ) |
nkeynes@477 | 351 | { |
nkeynes@477 | 352 | gl_fbo_detach(); |
nkeynes@669 | 353 | gl_display_blank( colour ); |
nkeynes@1251 | 354 | if( display_driver->swap_buffers ) |
nkeynes@1251 | 355 | display_driver->swap_buffers(); |
nkeynes@477 | 356 | } |
nkeynes@477 | 357 | |
nkeynes@477 | 358 | void gl_fbo_detach() |
nkeynes@352 | 359 | { |
nkeynes@1210 | 360 | glBindFramebuffer( GL_FRAMEBUFFER, 0 ); |
nkeynes@1076 | 361 | /* Make sure texture attachment is not a current draw/read buffer */ |
nkeynes@1228 | 362 | #ifdef HAVE_OPENGL_DRAW_BUFFER |
nkeynes@352 | 363 | glDrawBuffer( GL_FRONT ); |
nkeynes@352 | 364 | glReadBuffer( GL_FRONT ); |
nkeynes@1228 | 365 | #endif |
nkeynes@477 | 366 | } |
nkeynes@352 | 367 | |
nkeynes@477 | 368 | static gboolean gl_fbo_read_render_buffer( unsigned char *target, render_buffer_t buffer, |
nkeynes@736 | 369 | int rowstride, int format ) |
nkeynes@352 | 370 | { |
nkeynes@352 | 371 | int fb = gl_fbo_get_framebuffer( buffer->width, buffer->height ); |
nkeynes@424 | 372 | gl_fbo_attach_texture( fb, buffer->buf_id ); |
nkeynes@477 | 373 | return gl_read_render_buffer( target, buffer, rowstride, format ); |
nkeynes@352 | 374 | } |
nkeynes@352 | 375 | |
nkeynes@656 | 376 | #else |
nkeynes@656 | 377 | gboolean gl_fbo_is_supported() |
nkeynes@656 | 378 | { |
nkeynes@656 | 379 | return FALSE; |
nkeynes@656 | 380 | } |
nkeynes@656 | 381 | |
nkeynes@656 | 382 | void gl_fbo_init( display_driver_t driver ) |
nkeynes@656 | 383 | { |
nkeynes@656 | 384 | } |
nkeynes@656 | 385 | |
nkeynes@656 | 386 | #endif |
.