src/mesa/state_tracker/st_context.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef ST_CONTEXT_H
  29 #define ST_CONTEXT_H
  30
  31 #include "mtypes.h"
  32 #include "pipe/p_state.h"
  33
  34
  35 struct st_context;
  36 struct st_region;
  37 struct st_texture_object;
  38 struct st_texture_image;
  39 struct st_fragment_program;
  40 struct draw_context;
  41 struct draw_stage;
  42 struct cso_cache;
  43 struct cso_blend;
  44
  45 #define ST_NEW_MESA                    0x1 /* Mesa state has changed */
  46 #define ST_NEW_FRAGMENT_PROGRAM        0x2
  47 #define ST_NEW_VERTEX_PROGRAM          0x4
  48
  49 struct st_state_flags {
  50    GLuint mesa;
  51    GLuint st;
  52 };
  53
  54 struct st_tracked_state {
  55    const char *name;
  56    struct st_state_flags dirty;
  57    void (*update)( struct st_context *st );
  58 };
  59
  60
  61
  62
  63 struct st_context
  64 {
  65    GLcontext *ctx;
  66
  67    struct pipe_context *pipe;
  68
  69    struct draw_context *draw;  /**< For selection/feedback */
  70    struct draw_stage *feedback_stage;  /**< For FL_FEEDBACK rendermode */
  71    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
  72
  73    /* Eventually will use a cache to feed the pipe with
  74     * create/bind/delete calls to constant state objects.  Not yet
  75     * though, we just shove random objects across the interface.
  76     */
  77    struct {
  78       const struct cso_blend *blend;
  79       const struct pipe_sampler_state *sampler[PIPE_MAX_SAMPLERS];
  80       const struct pipe_depth_stencil_state *depth_stencil;
  81       const struct cso_rasterizer  *rasterizer;
  82       const struct cso_fragment_shader *fs;
  83       const struct cso_vertex_shader   *vs;
  84
  85       struct pipe_alpha_test_state  alpha_test;
  86       struct pipe_blend_color  blend_color;
  87       struct pipe_clear_color_state clear_color;
  88       struct pipe_clip_state clip;
  89       struct pipe_constant_buffer constants[2];
  90       struct pipe_feedback_state feedback;
  91       struct pipe_framebuffer_state framebuffer;
  92       struct pipe_mipmap_tree *texture[PIPE_MAX_SAMPLERS];
  93       struct pipe_poly_stipple poly_stipple;
  94       struct pipe_scissor_state scissor;
  95       struct pipe_viewport_state viewport;
  96    } state;
  97
  98    struct {
  99       struct st_tracked_state tracked_state[2];
 100    } constants;
 101
 102    struct {
 103       struct gl_fragment_program *fragment_program;
 104    } cb;
 105
 106    struct {
 107       GLuint frontbuffer_dirty:1;
 108    } flags;
 109
 110    char vendor[100];
 111    char renderer[100];
 112
 113    /* State to be validated:
 114     */
 115    struct st_tracked_state **atoms;
 116    GLuint nr_atoms;
 117
 118    struct st_state_flags dirty;
 119
 120    GLfloat polygon_offset_scale; /* ?? */
 121
 122    struct st_vertex_program *vp;
 123    struct st_fragment_program *fp;
 124
 125    struct pipe_buffer_handle *default_attrib_buffer;
 126
 127    struct cso_cache *cache;
 128 };
 129
 130
 131 /* Need this so that we can implement Mesa callbacks in this module.
 132  */
 133 static INLINE struct st_context *st_context(GLcontext *ctx)
 134 {
 135    return ctx->st;
 136 }
 137
 138
 139 extern void st_init_driver_functions(struct dd_function_table *functions);
 140
 141
 142
 143 #define Y_0_TOP 1
 144 #define Y_0_BOTTOM 2
 145
 146 static INLINE GLuint
 147 st_fb_orientation(const struct gl_framebuffer *fb)
 148 {
 149    if (fb && fb->Name == 0) {
 150       /* Drawing into a window (on-screen buffer).
 151        *
 152        * Negate Y scale to flip image vertically.
 153        * The NDC Y coords prior to viewport transformation are in the range
 154        * [y=-1=bottom, y=1=top]
 155        * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
 156        * H is the window height.
 157        * Use the viewport transformation to invert Y.
 158        */
 159       return Y_0_TOP;
 160    }
 161    else {
 162       /* Drawing into user-created FBO (very likely a texture).
 163        *
 164        * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
 165        */
 166       return Y_0_BOTTOM;
 167    }
 168 }
 169
 170
 171 #endif