modules/video_output/opengl/renderer.h

   1 /*****************************************************************************
   2  * renderer.h: OpenGL internal header
   3  *****************************************************************************
   4  * Copyright (C) 2016 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifndef VLC_GL_RENDERER_H
  22 #define VLC_GL_RENDERER_H
  23
  24 #include <vlc_common.h>
  25 #include <vlc_codec.h>
  26 #include <vlc_opengl.h>
  27 #include <vlc_plugin.h>
  28
  29 #include "gl_api.h"
  30 #include "gl_common.h"
  31 #include "interop.h"
  32 #include "sampler.h"
  33
  34 struct pl_context;
  35 struct pl_shader;
  36 struct pl_shader_res;
  37
  38 /**
  39  * OpenGL picture renderer
  40  */
  41 struct vlc_gl_renderer
  42 {
  43     /* Pointer to object gl, set by the caller */
  44     vlc_gl_t *gl;
  45
  46     /* Set by the caller */
  47     const struct vlc_gl_api *api;
  48     const opengl_vtable_t *vt; /* for convenience, same as &api->vt */
  49
  50     /* True to dump shaders, set by the caller */
  51     bool b_dump_shaders;
  52
  53     /* GLSL version, set by the caller. 100 for GLSL ES, 120 for desktop GLSL */
  54     unsigned glsl_version;
  55     /* Precision header, set by the caller. In OpenGLES, the fragment language
  56      * has no default precision qualifier for floating point types. */
  57     const char *glsl_precision_header;
  58
  59     GLuint program_id;
  60
  61     struct {
  62         GLfloat ProjectionMatrix[16];
  63         GLfloat StereoMatrix[3*3];
  64         GLfloat ZoomMatrix[16];
  65         GLfloat ViewMatrix[16];
  66     } var;
  67
  68     struct {
  69         GLint StereoMatrix;
  70         GLint ProjectionMatrix;
  71         GLint ViewMatrix;
  72         GLint ZoomMatrix;
  73     } uloc;
  74
  75     struct {
  76         GLint PicCoordsIn;
  77         GLint VertexPosition;
  78     } aloc;
  79
  80     struct vlc_gl_sampler *sampler;
  81
  82     video_format_t fmt;
  83
  84     unsigned nb_indices;
  85     GLuint vertex_buffer_object;
  86     GLuint index_buffer_object;
  87     GLuint texture_buffer_object;
  88
  89     /* View point */
  90     vlc_viewpoint_t vp;
  91     float f_teta;
  92     float f_phi;
  93     float f_roll;
  94     float f_fovx; /* f_fovx and f_fovy are linked but we keep both */
  95     float f_fovy; /* to avoid recalculating them when needed.      */
  96     float f_z;    /* Position of the camera on the shpere radius vector */
  97     float f_sar;
  98 };
  99
 100 /**
 101  * Create a new renderer
 102  *
 103  * \param gl the GL context
 104  * \param api the OpenGL API
 105  * \param sampler the OpenGL sampler
 106  * \param dump_shaders indicate if the shaders must be dumped in logs
 107  */
 108 struct vlc_gl_renderer *
 109 vlc_gl_renderer_New(vlc_gl_t *gl, const struct vlc_gl_api *api,
 110                     struct vlc_gl_sampler *sampler, bool dump_shaders);
 111
 112 /**
 113  * Delete a renderer
 114  *
 115  * \param renderer the renderer
 116  */
 117 void
 118 vlc_gl_renderer_Delete(struct vlc_gl_renderer *renderer);
 119
 120 /**
 121  * Draw the prepared picture
 122  *
 123  * \param sr the renderer
 124  */
 125 int
 126 vlc_gl_renderer_Draw(struct vlc_gl_renderer *renderer);
 127
 128 int
 129 vlc_gl_renderer_SetViewpoint(struct vlc_gl_renderer *renderer,
 130                              const vlc_viewpoint_t *p_vp);
 131
 132 void
 133 vlc_gl_renderer_SetWindowAspectRatio(struct vlc_gl_renderer *renderer,
 134                                      float f_sar);
 135
 136 #endif /* include-guard */