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5485d806c5
Checks which features of a given memory format are supported by the current GL implementation. We check: * usable: Can be used as a texture with NEAREST filter * renderable: Can be used as a render target * filterable: Can be used with GL_LINEAR In normal GL, all formats are all of these things, but GLES is a lot more picky. So far nobody uses this.
191 lines
9.1 KiB
C
191 lines
9.1 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkglcontextprivate.h: GL context abstraction
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*
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* Copyright © 2014 Emmanuele Bassi
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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 under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "gdkglcontext.h"
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#include "gdkdrawcontextprivate.h"
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#include "gdkglversionprivate.h"
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#include "gdkdmabufprivate.h"
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G_BEGIN_DECLS
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typedef enum {
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GDK_GL_NONE = 0,
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GDK_GL_EGL,
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GDK_GL_GLX,
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GDK_GL_WGL,
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GDK_GL_CGL
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} GdkGLBackend;
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typedef enum {
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/* The format is supported for glTexImage2D() */
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GDK_GL_FORMAT_USABLE = 1 << 0,
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/* The format can be rendered to.
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* GL/GLES spec term: "color-renderable" */
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GDK_GL_FORMAT_RENDERABLE = 1 << 1,
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/* GL_LINEAR/GL_MIPMAP_LINEAR can be used for textures in this format.
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* GLES spec term: "texture-filterable" */
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GDK_GL_FORMAT_FILTERABLE = 1 << 2
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} GdkGLMemoryFlags;
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/* The maximum amount of buffers we track update regions for.
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* Note that this is equal to the max buffer age value we
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* can provide a damage region for */
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#define GDK_GL_MAX_TRACKED_BUFFERS 4
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#define GDK_GL_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_GL_CONTEXT, GdkGLContextClass))
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#define GDK_IS_GL_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_GL_CONTEXT))
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#define GDK_GL_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_GL_CONTEXT, GdkGLContextClass))
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typedef struct _GdkGLContextClass GdkGLContextClass;
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struct _GdkGLContext
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{
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GdkDrawContext parent_instance;
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/* We store the old drawn areas to support buffer-age optimizations */
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cairo_region_t *old_updated_area[GDK_GL_MAX_TRACKED_BUFFERS];
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};
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struct _GdkGLContextClass
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{
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GdkDrawContextClass parent_class;
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GdkGLBackend backend_type;
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GdkGLAPI (* realize) (GdkGLContext *context,
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GError **error);
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gboolean (* make_current) (GdkGLContext *context,
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gboolean surfaceless);
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gboolean (* clear_current) (GdkGLContext *context);
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gboolean (* is_current) (GdkGLContext *context);
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cairo_region_t * (* get_damage) (GdkGLContext *context);
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gboolean (* is_shared) (GdkGLContext *self,
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GdkGLContext *other);
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guint (* get_default_framebuffer) (GdkGLContext *self);
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};
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typedef struct {
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guint program;
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guint position_location;
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guint uv_location;
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guint map_location;
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guint flip_location;
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} GdkGLContextProgram;
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typedef struct {
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guint tmp_framebuffer;
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guint tmp_vertex_buffer;
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GdkGLContextProgram texture_2d_quad_program;
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GdkGLContextProgram texture_rect_quad_program;
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GdkGLContextProgram *current_program;
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guint is_legacy : 1;
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guint use_es : 1;
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} GdkGLContextPaintData;
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gboolean gdk_gl_backend_can_be_used (GdkGLBackend backend_type,
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GError **error);
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void gdk_gl_backend_use (GdkGLBackend backend_type);
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void gdk_gl_context_clear_current_if_surface (GdkSurface *surface);
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GdkGLContext * gdk_gl_context_new (GdkDisplay *display,
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GdkSurface *surface);
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gboolean gdk_gl_context_is_api_allowed (GdkGLContext *self,
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GdkGLAPI api,
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GError **error);
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void gdk_gl_context_set_version (GdkGLContext *context,
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const GdkGLVersion *version);
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void gdk_gl_context_set_is_legacy (GdkGLContext *context,
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gboolean is_legacy);
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gboolean gdk_gl_context_check_gl_version (GdkGLContext *context,
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const GdkGLVersion *gl_version,
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const GdkGLVersion *gles_version);
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static inline gboolean
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gdk_gl_context_check_version (GdkGLContext *context,
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const char *gl_version,
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const char *gles_version)
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{
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return gdk_gl_context_check_gl_version (context,
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gl_version ? &GDK_GL_VERSION_STRING (gl_version) : NULL,
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gles_version ? &GDK_GL_VERSION_STRING (gles_version) : NULL);
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}
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void gdk_gl_context_get_matching_version (GdkGLContext *context,
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GdkGLAPI api,
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gboolean legacy,
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GdkGLVersion *out_version);
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gboolean gdk_gl_context_has_unpack_subimage (GdkGLContext *context);
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void gdk_gl_context_push_debug_group (GdkGLContext *context,
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const char *message);
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void gdk_gl_context_push_debug_group_printf (GdkGLContext *context,
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const char *format,
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...) G_GNUC_PRINTF (2, 3);
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void gdk_gl_context_pop_debug_group (GdkGLContext *context);
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void gdk_gl_context_label_object (GdkGLContext *context,
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guint identifier,
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guint name,
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const char *label);
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void gdk_gl_context_label_object_printf (GdkGLContext *context,
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guint identifier,
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guint name,
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const char *format,
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...) G_GNUC_PRINTF (4, 5);
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const char * gdk_gl_context_get_glsl_version_string (GdkGLContext *self);
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GdkGLMemoryFlags gdk_gl_context_get_format_flags (GdkGLContext *self,
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GdkMemoryFormat format) G_GNUC_PURE;
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gboolean gdk_gl_context_has_debug (GdkGLContext *self) G_GNUC_PURE;
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gboolean gdk_gl_context_use_es_bgra (GdkGLContext *context);
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gboolean gdk_gl_context_has_vertex_half_float (GdkGLContext *self) G_GNUC_PURE;
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gboolean gdk_gl_context_has_sync (GdkGLContext *self) G_GNUC_PURE;
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gboolean gdk_gl_context_has_bgra (GdkGLContext *self) G_GNUC_PURE;
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gboolean gdk_gl_context_has_vertex_arrays (GdkGLContext *self) G_GNUC_PURE;
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double gdk_gl_context_get_scale (GdkGLContext *self);
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guint gdk_gl_context_import_dmabuf (GdkGLContext *self,
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int width,
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int height,
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const GdkDmabuf *dmabuf,
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gboolean *external);
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gboolean gdk_gl_context_export_dmabuf (GdkGLContext *self,
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unsigned int texture_id,
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GdkDmabuf *dmabuf);
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G_END_DECLS
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