mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2026-05-05 15:48:00 +02:00
gl: Move device-specific code into cairo-gl-device.c
This commit is contained in:
Benjamin Otte
parent
0ff5a18fd5
commit
90c64f60d8
3 changed files with 210 additions and 163 deletions
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@ -313,7 +313,11 @@ cairo_beos_headers = cairo-beos.h
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cairo_gl_headers = cairo-gl.h
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cairo_gl_private = cairo-gl-private.h
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cairo_gl_sources = cairo-gl-surface.c cairo-gl-glyphs.c cairo-gl-shaders.c
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cairo_gl_sources = cairo-gl-device.c \
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cairo-gl-glyphs.c \
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cairo-gl-shaders.c \
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cairo-gl-surface.c
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cairo_glx_sources += cairo-glx-context.c
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cairo_egl_sources += cairo-egl-context.c
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205
src/cairo-gl-device.c
Normal file
205
src/cairo-gl-device.c
Normal file
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@ -0,0 +1,205 @@
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/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2009 Eric Anholt
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* Copyright © 2009 Chris Wilson
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* Copyright © 2005 Red Hat, Inc
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Red Hat, Inc.
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*
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* Contributor(s):
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* Carl Worth <cworth@cworth.org>
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*/
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#include "cairoint.h"
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#include "cairo-error-private.h"
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#include "cairo-gl-private.h"
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static void
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_gl_lock (void *device)
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{
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cairo_gl_context_t *ctx = (cairo_gl_context_t *) device;
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ctx->acquire (ctx);
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}
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static void
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_gl_unlock (void *device)
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{
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cairo_gl_context_t *ctx = (cairo_gl_context_t *) device;
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ctx->release (ctx);
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ctx->current_target = NULL;
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}
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static void
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_gl_destroy (void *device)
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{
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cairo_gl_context_t *ctx = device;
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cairo_scaled_font_t *scaled_font, *next_scaled_font;
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int n;
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ctx->acquire (ctx);
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cairo_list_foreach_entry_safe (scaled_font,
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next_scaled_font,
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cairo_scaled_font_t,
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&ctx->fonts,
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link)
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{
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_cairo_scaled_font_revoke_ownership (scaled_font);
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}
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for (n = 0; n < ARRAY_LENGTH (ctx->glyph_cache); n++)
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_cairo_gl_glyph_cache_fini (ctx, &ctx->glyph_cache[n]);
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ctx->destroy (ctx);
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free (ctx);
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}
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static const cairo_device_backend_t _cairo_gl_device_backend = {
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CAIRO_DEVICE_TYPE_GL,
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_gl_lock,
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_gl_unlock,
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NULL, /* flush */
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NULL, /* finish */
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_gl_destroy,
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};
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cairo_status_t
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_cairo_gl_context_init (cairo_gl_context_t *ctx)
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{
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int n;
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_cairo_device_init (&ctx->base, &_cairo_gl_device_backend);
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memset (ctx->glyph_cache, 0, sizeof (ctx->glyph_cache));
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cairo_list_init (&ctx->fonts);
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if (glewInit () != GLEW_OK)
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return _cairo_error (CAIRO_STATUS_INVALID_FORMAT); /* XXX */
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if (! GLEW_EXT_framebuffer_object ||
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! GLEW_ARB_texture_env_combine ||
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! GLEW_EXT_bgra)
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{
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fprintf (stderr,
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"Required GL extensions not available:\n");
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if (! GLEW_EXT_framebuffer_object)
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fprintf (stderr, " GL_EXT_framebuffer_object\n");
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if (! GLEW_ARB_texture_env_combine)
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fprintf (stderr, " GL_ARB_texture_env_combine\n");
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/* EXT_bgra is used in two places:
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* - draw_image to upload common pixman formats without hand-swizzling.
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* - get_image to download common pixman formats without hand-swizzling.
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*/
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if (! GLEW_EXT_bgra)
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fprintf (stderr, " GL_EXT_bgra\n");
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return _cairo_error (CAIRO_STATUS_INVALID_FORMAT); /* XXX */
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}
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if (! GLEW_ARB_texture_non_power_of_two &&
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! GLEW_ARB_texture_rectangle ) {
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fprintf (stderr,
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"Required GL extensions not available:\n");
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fprintf (stderr, " GL_ARB_texture_non_power_of_two, GL_ARB_texture_rectangle\n");
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}
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if (!GLEW_ARB_texture_non_power_of_two)
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ctx->tex_target = GL_TEXTURE_RECTANGLE_EXT;
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else
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ctx->tex_target = GL_TEXTURE_2D;
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if (GLEW_VERSION_2_0 ||
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(GLEW_ARB_fragment_shader &&
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GLEW_ARB_vertex_shader &&
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GLEW_ARB_shader_objects))
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{
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ctx->using_glsl = TRUE;
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}
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init_shader_program (&ctx->fill_rectangles_shader);
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/* Set up the dummy texture for tex_env_combine with constant color. */
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glGenTextures (1, &ctx->dummy_tex);
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glBindTexture (ctx->tex_target, ctx->dummy_tex);
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glTexImage2D (ctx->tex_target, 0, GL_RGBA, 1, 1, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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/* PBO for any sort of texture upload */
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glGenBuffersARB (1, &ctx->texture_load_pbo);
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glGenBuffersARB (1, &ctx->vbo);
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ctx->max_framebuffer_size = 0;
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glGetIntegerv (GL_MAX_RENDERBUFFER_SIZE, &ctx->max_framebuffer_size);
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ctx->max_texture_size = 0;
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glGetIntegerv (GL_MAX_TEXTURE_SIZE, &ctx->max_texture_size);
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for (n = 0; n < ARRAY_LENGTH (ctx->glyph_cache); n++)
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_cairo_gl_glyph_cache_init (&ctx->glyph_cache[n]);
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return CAIRO_STATUS_SUCCESS;
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}
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void
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_cairo_gl_set_destination (cairo_gl_context_t *ctx,
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cairo_gl_surface_t *surface)
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{
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if (ctx->current_target != surface) {
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ctx->current_target = surface;
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if (surface->fb) {
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, surface->fb);
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glDrawBuffer (GL_COLOR_ATTACHMENT0_EXT);
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glReadBuffer (GL_COLOR_ATTACHMENT0_EXT);
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} else {
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ctx->make_current (ctx, surface);
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
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glDrawBuffer (GL_BACK_LEFT);
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glReadBuffer (GL_BACK_LEFT);
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}
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}
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glViewport (0, 0, surface->width, surface->height);
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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if (surface->fb)
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glOrtho (0, surface->width, 0, surface->height, -1.0, 1.0);
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else
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glOrtho (0, surface->width, surface->height, 0, -1.0, 1.0);
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glMatrixMode (GL_MODELVIEW);
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glLoadIdentity ();
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}
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@ -67,137 +67,6 @@ static cairo_bool_t _cairo_surface_is_gl (cairo_surface_t *surface)
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return surface->backend == &_cairo_gl_surface_backend;
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}
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static void
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_gl_lock (void *device)
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{
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cairo_gl_context_t *ctx = (cairo_gl_context_t *) device;
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ctx->acquire (ctx);
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}
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static void
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_gl_unlock (void *device)
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{
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cairo_gl_context_t *ctx = (cairo_gl_context_t *) device;
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ctx->release (ctx);
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ctx->current_target = NULL;
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}
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static void
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_gl_destroy (void *device)
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{
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cairo_gl_context_t *ctx = device;
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cairo_scaled_font_t *scaled_font, *next_scaled_font;
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int n;
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ctx->acquire (ctx);
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cairo_list_foreach_entry_safe (scaled_font,
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next_scaled_font,
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cairo_scaled_font_t,
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&ctx->fonts,
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link)
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{
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_cairo_scaled_font_revoke_ownership (scaled_font);
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}
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for (n = 0; n < ARRAY_LENGTH (ctx->glyph_cache); n++)
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_cairo_gl_glyph_cache_fini (ctx, &ctx->glyph_cache[n]);
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ctx->destroy (ctx);
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free (ctx);
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}
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static const cairo_device_backend_t _cairo_gl_device_backend = {
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CAIRO_DEVICE_TYPE_GL,
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_gl_lock,
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_gl_unlock,
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NULL, /* flush */
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NULL, /* finish */
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_gl_destroy,
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};
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cairo_status_t
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_cairo_gl_context_init (cairo_gl_context_t *ctx)
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{
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int n;
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_cairo_device_init (&ctx->base, &_cairo_gl_device_backend);
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memset (ctx->glyph_cache, 0, sizeof (ctx->glyph_cache));
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cairo_list_init (&ctx->fonts);
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if (glewInit () != GLEW_OK)
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return _cairo_error (CAIRO_STATUS_INVALID_FORMAT); /* XXX */
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if (! GLEW_EXT_framebuffer_object ||
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! GLEW_ARB_texture_env_combine ||
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! GLEW_EXT_bgra)
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{
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fprintf (stderr,
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"Required GL extensions not available:\n");
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if (! GLEW_EXT_framebuffer_object)
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fprintf (stderr, " GL_EXT_framebuffer_object\n");
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if (! GLEW_ARB_texture_env_combine)
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fprintf (stderr, " GL_ARB_texture_env_combine\n");
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/* EXT_bgra is used in two places:
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* - draw_image to upload common pixman formats without hand-swizzling.
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* - get_image to download common pixman formats without hand-swizzling.
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*/
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if (! GLEW_EXT_bgra)
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fprintf (stderr, " GL_EXT_bgra\n");
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return _cairo_error (CAIRO_STATUS_INVALID_FORMAT); /* XXX */
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}
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if (! GLEW_ARB_texture_non_power_of_two &&
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! GLEW_ARB_texture_rectangle ) {
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fprintf (stderr,
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"Required GL extensions not available:\n");
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fprintf (stderr, " GL_ARB_texture_non_power_of_two, GL_ARB_texture_rectangle\n");
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}
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if (!GLEW_ARB_texture_non_power_of_two)
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ctx->tex_target = GL_TEXTURE_RECTANGLE_EXT;
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else
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ctx->tex_target = GL_TEXTURE_2D;
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if (GLEW_VERSION_2_0 ||
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(GLEW_ARB_fragment_shader &&
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GLEW_ARB_vertex_shader &&
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GLEW_ARB_shader_objects))
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{
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ctx->using_glsl = TRUE;
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}
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init_shader_program (&ctx->fill_rectangles_shader);
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/* Set up the dummy texture for tex_env_combine with constant color. */
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glGenTextures (1, &ctx->dummy_tex);
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glBindTexture (ctx->tex_target, ctx->dummy_tex);
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glTexImage2D (ctx->tex_target, 0, GL_RGBA, 1, 1, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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/* PBO for any sort of texture upload */
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glGenBuffersARB (1, &ctx->texture_load_pbo);
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glGenBuffersARB (1, &ctx->vbo);
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ctx->max_framebuffer_size = 0;
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glGetIntegerv (GL_MAX_RENDERBUFFER_SIZE, &ctx->max_framebuffer_size);
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ctx->max_texture_size = 0;
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glGetIntegerv (GL_MAX_TEXTURE_SIZE, &ctx->max_texture_size);
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for (n = 0; n < ARRAY_LENGTH (ctx->glyph_cache); n++)
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_cairo_gl_glyph_cache_init (&ctx->glyph_cache[n]);
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return CAIRO_STATUS_SUCCESS;
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}
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cairo_bool_t
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_cairo_gl_get_image_format_and_type (pixman_format_code_t pixman_format,
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GLenum *internal_format, GLenum *format,
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@ -319,37 +188,6 @@ _cairo_gl_get_image_format_and_type (pixman_format_code_t pixman_format,
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}
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}
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void
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_cairo_gl_set_destination (cairo_gl_context_t *ctx, cairo_gl_surface_t *surface)
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{
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if (ctx->current_target != surface) {
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ctx->current_target = surface;
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if (surface->fb) {
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, surface->fb);
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glDrawBuffer (GL_COLOR_ATTACHMENT0_EXT);
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glReadBuffer (GL_COLOR_ATTACHMENT0_EXT);
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} else {
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ctx->make_current (ctx, surface);
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
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glDrawBuffer (GL_BACK_LEFT);
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glReadBuffer (GL_BACK_LEFT);
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}
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}
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glViewport (0, 0, surface->width, surface->height);
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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if (surface->fb)
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glOrtho (0, surface->width, 0, surface->height, -1.0, 1.0);
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else
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glOrtho (0, surface->width, surface->height, 0, -1.0, 1.0);
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glMatrixMode (GL_MODELVIEW);
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glLoadIdentity ();
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}
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cairo_bool_t
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_cairo_gl_operator_is_supported (cairo_operator_t op)
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{
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