nkeynes@639: /**
nkeynes@639:  * $Id$
nkeynes@639:  *
nkeynes@639:  * Standard OpenGL rendering engine. 
nkeynes@639:  *
nkeynes@639:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@639:  *
nkeynes@639:  * This program is free software; you can redistribute it and/or modify
nkeynes@639:  * it under the terms of the GNU General Public License as published by
nkeynes@639:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@639:  * (at your option) any later version.
nkeynes@639:  *
nkeynes@639:  * This program is distributed in the hope that it will be useful,
nkeynes@639:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@639:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@639:  * GNU General Public License for more details.
nkeynes@639:  */
nkeynes@639: 
nkeynes@645: #include <assert.h>
nkeynes@669: #include <sys/time.h>
nkeynes@639: #include "display.h"
nkeynes@639: #include "pvr2/pvr2.h"
nkeynes@677: #include "pvr2/pvr2mmio.h"
nkeynes@1145: #include "pvr2/glutil.h"
nkeynes@639: #include "pvr2/scene.h"
nkeynes@1145: #include "pvr2/tileiter.h"
nkeynes@1207: #include "pvr2/shaders.h"
nkeynes@653: 
nkeynes@1156: #ifdef APPLE_BUILD
nkeynes@1156: #include "OpenGL/CGLCurrent.h"
nkeynes@1156: #include "OpenGL/CGLMacro.h"
nkeynes@1156: 
nkeynes@1156: static CGLContextObj CGL_MACRO_CONTEXT;
nkeynes@1156: #endif
nkeynes@1156: 
nkeynes@1232: #define IS_NONEMPTY_TILE_LIST(p) (IS_TILE_PTR(p) && ((*((uint32_t *)(pvr2_main_ram+(p))) >> 28) != 0x0F))
nkeynes@639: 
nkeynes@645: int pvr2_poly_depthmode[8] = { GL_NEVER, GL_LESS, GL_EQUAL, GL_LEQUAL,
nkeynes@736:         GL_GREATER, GL_NOTEQUAL, GL_GEQUAL, 
nkeynes@736:         GL_ALWAYS };
nkeynes@645: int pvr2_poly_srcblend[8] = { 
nkeynes@736:         GL_ZERO, GL_ONE, GL_DST_COLOR, GL_ONE_MINUS_DST_COLOR,
nkeynes@736:         GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA, 
nkeynes@736:         GL_ONE_MINUS_DST_ALPHA };
nkeynes@645: int pvr2_poly_dstblend[8] = {
nkeynes@736:         GL_ZERO, GL_ONE, GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR,
nkeynes@736:         GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_DST_ALPHA,
nkeynes@736:         GL_ONE_MINUS_DST_ALPHA };
nkeynes@645: 
nkeynes@1140: static gboolean have_shaders = FALSE;
nkeynes@1154: static int currentTexId = -1;
nkeynes@1154: 
nkeynes@1154: static inline void bind_texture(int texid)
nkeynes@1154: {
nkeynes@1154:     if( currentTexId != texid ) {
nkeynes@1154:         currentTexId = texid;
nkeynes@1154:         glBindTexture(GL_TEXTURE_2D, texid);
nkeynes@1154:     }
nkeynes@1154: }
nkeynes@1140: 
nkeynes@639: /**
nkeynes@639:  * Clip the tile bounds to the clipping plane. 
nkeynes@639:  * @return TRUE if the tile was not clipped completely.
nkeynes@639:  */
nkeynes@1232: static gboolean clip_tile_bounds( uint32_t *tile, uint32_t *clip )
nkeynes@639: {
nkeynes@639:     if( tile[0] < clip[0] ) tile[0] = clip[0];
nkeynes@639:     if( tile[1] > clip[1] ) tile[1] = clip[1];
nkeynes@639:     if( tile[2] < clip[2] ) tile[2] = clip[2];
nkeynes@639:     if( tile[3] > clip[3] ) tile[3] = clip[3];
nkeynes@639:     return tile[0] < tile[1] && tile[2] < tile[3];
nkeynes@639: }
nkeynes@639: 
nkeynes@1145: static void drawrect2d( uint32_t tile_bounds[], float z )
nkeynes@1145: {
nkeynes@1232:     glBegin( GL_TRIANGLE_STRIP );
nkeynes@1145:     glVertex3f( tile_bounds[0], tile_bounds[2], z );
nkeynes@1145:     glVertex3f( tile_bounds[1], tile_bounds[2], z );
nkeynes@1232:     glVertex3f( tile_bounds[0], tile_bounds[3], z );
nkeynes@1145:     glVertex3f( tile_bounds[1], tile_bounds[3], z );
nkeynes@1145:     glEnd();
nkeynes@1145: }
nkeynes@1145: 
nkeynes@1154: static void pvr2_scene_load_textures()
nkeynes@645: {
nkeynes@645:     int i;
nkeynes@886:     
nkeynes@1135:     texcache_begin_scene( MMIO_READ( PVR2, RENDER_PALETTE ) & 0x03,
nkeynes@886:                          (MMIO_READ( PVR2, RENDER_TEXSIZE ) & 0x003F) << 5 );
nkeynes@886:     
nkeynes@645:     for( i=0; i < pvr2_scene.poly_count; i++ ) {
nkeynes@736:         struct polygon_struct *poly = &pvr2_scene.poly_array[i];
nkeynes@736:         if( POLY1_TEXTURED(poly->context[0]) ) {
nkeynes@1135:             poly->tex_id = texcache_get_texture( poly->context[1], poly->context[2] );
nkeynes@736:             if( poly->mod_vertex_index != -1 ) {
nkeynes@863:                 if( pvr2_scene.shadow_mode == SHADOW_FULL ) {
nkeynes@1135:                     poly->mod_tex_id = texcache_get_texture( poly->context[3], poly->context[4] );
nkeynes@863:                 } else {
nkeynes@863:                     poly->mod_tex_id = poly->tex_id;
nkeynes@863:                 }
nkeynes@736:             }
nkeynes@736:         } else {
nkeynes@1138:             poly->tex_id = 0;
nkeynes@1138:             poly->mod_tex_id = 0;
nkeynes@736:         }
nkeynes@645:     }
nkeynes@645: }
nkeynes@645: 
nkeynes@645: 
nkeynes@639: /**
nkeynes@639:  * Once-off call to setup the OpenGL context.
nkeynes@639:  */
nkeynes@639: void pvr2_setup_gl_context()
nkeynes@639: {
nkeynes@1140:     if( glsl_is_supported() && isGLMultitextureSupported() ) {
nkeynes@1130:         if( !glsl_load_shaders( ) ) {
nkeynes@665:             WARN( "Unable to load GL shaders" );
nkeynes@1140:         } else {
nkeynes@1140:             have_shaders = TRUE;
nkeynes@665:         }
nkeynes@665:     }
nkeynes@736: 
nkeynes@1156: #ifdef APPLE_BUILD
nkeynes@1156:     CGL_MACRO_CONTEXT = CGLGetCurrentContext();
nkeynes@1156: #endif
nkeynes@1233:     texcache_gl_init(have_shaders); // Allocate texture IDs
nkeynes@1236: 
nkeynes@1236:     /* Global settings */
nkeynes@1133:     glDisable( GL_CULL_FACE );
nkeynes@639:     glEnable( GL_BLEND );
nkeynes@1236:     glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
nkeynes@639: 
nkeynes@687: #ifdef HAVE_OPENGL_CLAMP_COLOR
nkeynes@687:     if( isGLExtensionSupported("GL_ARB_color_buffer_float") ) {
nkeynes@687:         glClampColorARB(GL_CLAMP_VERTEX_COLOR_ARB, GL_FALSE );
nkeynes@687:         glClampColorARB(GL_CLAMP_FRAGMENT_COLOR_ARB, GL_FALSE );
nkeynes@687:     }
nkeynes@687: #endif
nkeynes@653: 
nkeynes@1236: #ifdef HAVE_OPENGL_FIXEDFUNC
nkeynes@1236:     /* Setup defaults for perspective correction + matrices */
nkeynes@1236:     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
nkeynes@1236:     glMatrixMode(GL_MODELVIEW);
nkeynes@1236:     glLoadIdentity();
nkeynes@1236:     glMatrixMode(GL_PROJECTION);
nkeynes@1236: #endif
nkeynes@1236: 
nkeynes@639: 
nkeynes@1232: #ifdef HAVE_OPENGL_CLEAR_DEPTHF
nkeynes@1232:     glClearDepthf(0);
nkeynes@1232: #else
nkeynes@639:     glClearDepth(0);
nkeynes@1232: #endif
nkeynes@639:     glClearStencil(0);
nkeynes@639: }
nkeynes@639: 
nkeynes@864: /**
nkeynes@864:  * Setup the basic context that's shared between normal and modified modes -
nkeynes@864:  * depth, culling
nkeynes@864:  */
nkeynes@1137: static void render_set_base_context( uint32_t poly1, gboolean set_depth )
nkeynes@864: {
nkeynes@1137:     if( set_depth ) {
nkeynes@865:         glDepthFunc( POLY1_DEPTH_MODE(poly1) );
nkeynes@865:     }
nkeynes@865: 
nkeynes@864:     glDepthMask( POLY1_DEPTH_WRITE(poly1) ? GL_TRUE : GL_FALSE );
nkeynes@865: }
nkeynes@864: 
nkeynes@865: /**
nkeynes@865:  * Setup the texture/shading settings (TSP) which vary between mod/unmod modes.
nkeynes@865:  */
nkeynes@1154: static void render_set_tsp_context( uint32_t poly1, uint32_t poly2 )
nkeynes@865: {
nkeynes@863:     glShadeModel( POLY1_SHADE_MODEL(poly1) );
nkeynes@1140: 
nkeynes@1232: #ifdef HAVE_OPENGL_FIXEDFUNC
nkeynes@1219:     if( !have_shaders ) {
nkeynes@1219:         if( POLY1_TEXTURED(poly1) ) {
nkeynes@1219:             if( POLY2_TEX_BLEND(poly2) == 2 )
nkeynes@1219:                 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );
nkeynes@1219:             else
nkeynes@1219:                 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
nkeynes@1232:    
nkeynes@1232:          }
nkeynes@1140: 
nkeynes@1232:          switch( POLY2_FOG_MODE(poly2) ) {
nkeynes@1232:          case PVR2_POLY_FOG_LOOKUP:
nkeynes@1232:              glFogfv( GL_FOG_COLOR, pvr2_scene.fog_lut_colour );
nkeynes@1232:              break;
nkeynes@1232:          case PVR2_POLY_FOG_VERTEX:
nkeynes@1232:              glFogfv( GL_FOG_COLOR, pvr2_scene.fog_vert_colour );
nkeynes@1232:              break;
nkeynes@1232:          }
nkeynes@863:      }
nkeynes@1232: #endif
nkeynes@653: 
nkeynes@863:      int srcblend = POLY2_SRC_BLEND(poly2);
nkeynes@863:      int destblend = POLY2_DEST_BLEND(poly2);
nkeynes@863:      glBlendFunc( srcblend, destblend );
nkeynes@863: 
nkeynes@863:      if( POLY2_SRC_BLEND_TARGET(poly2) || POLY2_DEST_BLEND_TARGET(poly2) ) {
nkeynes@863:          WARN( "Accumulation buffer not supported" );
nkeynes@863:      }   
nkeynes@863: }
nkeynes@863: 
nkeynes@645: /**
nkeynes@645:  * Setup the GL context for the supplied polygon context.
nkeynes@645:  * @param context pointer to 3 or 5 words of polygon context
nkeynes@865:  * @param depth_mode force depth mode, or 0 to use the polygon's
nkeynes@865:  * depth mode.
nkeynes@645:  */
nkeynes@1154: static void render_set_context( uint32_t *context, gboolean set_depth )
nkeynes@645: {
nkeynes@1137:     render_set_base_context(context[0], set_depth);
nkeynes@1137:     render_set_tsp_context(context[0],context[1]);
nkeynes@645: }
nkeynes@645: 
nkeynes@1133: static inline void gl_draw_vertexes( struct polygon_struct *poly )
nkeynes@1133: {
nkeynes@1133:     do {
nkeynes@1133:         glDrawArrays(GL_TRIANGLE_STRIP, poly->vertex_index, poly->vertex_count);
nkeynes@1133:         poly = poly->sub_next;
nkeynes@1133:     } while( poly != NULL );
nkeynes@1133: }
nkeynes@1133: 
nkeynes@1133: static inline void gl_draw_mod_vertexes( struct polygon_struct *poly )
nkeynes@1133: {
nkeynes@1133:     do {
nkeynes@1133:         glDrawArrays(GL_TRIANGLE_STRIP, poly->mod_vertex_index, poly->vertex_count);
nkeynes@1133:         poly = poly->sub_next;
nkeynes@1133:     } while( poly != NULL );
nkeynes@1133: }
nkeynes@645: 
nkeynes@1153: static void gl_render_poly( struct polygon_struct *poly, gboolean set_depth)
nkeynes@639: {
nkeynes@1133:     if( poly->vertex_count == 0 )
nkeynes@1133:         return; /* Culled */
nkeynes@1133: 
nkeynes@1154:     bind_texture(poly->tex_id);
nkeynes@863:     if( poly->mod_vertex_index == -1 ) {
nkeynes@1137:         render_set_context( poly->context, set_depth );
nkeynes@1133:         gl_draw_vertexes(poly);
nkeynes@864:     }  else {
nkeynes@864:         glEnable( GL_STENCIL_TEST );
nkeynes@1137:         render_set_base_context( poly->context[0], set_depth );
nkeynes@1137:         render_set_tsp_context( poly->context[0], poly->context[1] );
nkeynes@864:         glStencilFunc(GL_EQUAL, 0, 2);
nkeynes@1133:         gl_draw_vertexes(poly);
nkeynes@863: 
nkeynes@863:         if( pvr2_scene.shadow_mode == SHADOW_FULL ) {
nkeynes@1154:             bind_texture(poly->mod_tex_id);
nkeynes@1137:             render_set_tsp_context( poly->context[0], poly->context[3] );
nkeynes@863:         }
nkeynes@864:         glStencilFunc(GL_EQUAL, 2, 2);
nkeynes@1133:         gl_draw_mod_vertexes(poly);
nkeynes@1136:         glDisable( GL_STENCIL_TEST );
nkeynes@863:     }
nkeynes@639: }
nkeynes@639: 
nkeynes@687: 
nkeynes@1145: static void gl_render_modifier_polygon( struct polygon_struct *poly, uint32_t tile_bounds[] )
nkeynes@864: {
nkeynes@864:     /* A bit of explanation:
nkeynes@864:      * In theory it works like this: generate a 1-bit stencil for each polygon
nkeynes@864:      * volume, and then AND or OR it against the overall 1-bit tile stencil at 
nkeynes@864:      * the end of the volume. 
nkeynes@864:      * 
nkeynes@864:      * The implementation here uses a 2-bit stencil buffer, where each volume
nkeynes@864:      * is drawn using only stencil bit 0, and then a 'flush' polygon is drawn
nkeynes@864:      * to update bit 1 accordingly and clear bit 0.
nkeynes@864:      * 
nkeynes@864:      * This could probably be more efficient, but at least it works correctly 
nkeynes@864:      * now :)
nkeynes@864:      */
nkeynes@864:     
nkeynes@1133:     if( poly->vertex_count == 0 )
nkeynes@1133:         return; /* Culled */
nkeynes@1133: 
nkeynes@1133:     gl_draw_vertexes(poly);
nkeynes@1133: 
nkeynes@1133: 
nkeynes@864:     
nkeynes@864:     int poly_type = POLY1_VOLUME_MODE(poly->context[0]);
nkeynes@864:     if( poly_type == PVR2_VOLUME_REGION0 ) {
nkeynes@864:         /* 00 => 00
nkeynes@864:          * 01 => 00
nkeynes@864:          * 10 => 10
nkeynes@864:          * 11 => 00
nkeynes@864:          */
nkeynes@864:         glStencilMask( 0x03 );
nkeynes@864:         glStencilFunc(GL_EQUAL, 0x02, 0x03);
nkeynes@864:         glStencilOp(GL_ZERO, GL_KEEP, GL_KEEP);
nkeynes@864:         glDisable( GL_DEPTH_TEST );
nkeynes@864: 
nkeynes@864:         drawrect2d( tile_bounds, pvr2_scene.bounds[4] );
nkeynes@864:         
nkeynes@864:         glEnable( GL_DEPTH_TEST );
nkeynes@864:         glStencilMask( 0x01 );
nkeynes@864:         glStencilFunc( GL_ALWAYS, 0, 1 );
nkeynes@864:         glStencilOp( GL_KEEP,GL_INVERT, GL_KEEP ); 
nkeynes@864:     } else if( poly_type == PVR2_VOLUME_REGION1 ) {
nkeynes@864:         /* This is harder with the standard stencil ops - do it in two passes
nkeynes@864:          * 00 => 00 | 00 => 10
nkeynes@864:          * 01 => 10 | 01 => 10
nkeynes@864:          * 10 => 10 | 10 => 00
nkeynes@864:          * 11 => 10 | 11 => 10
nkeynes@864:          */
nkeynes@864:         glStencilMask( 0x02 );
nkeynes@864:         glStencilOp( GL_INVERT, GL_INVERT, GL_INVERT );
nkeynes@864:         glDisable( GL_DEPTH_TEST );
nkeynes@864:         
nkeynes@864:         drawrect2d( tile_bounds, pvr2_scene.bounds[4] );
nkeynes@864:         
nkeynes@864:         glStencilMask( 0x03 );
nkeynes@864:         glStencilFunc( GL_NOTEQUAL,0x02, 0x03);
nkeynes@864:         glStencilOp( GL_ZERO, GL_REPLACE, GL_REPLACE );
nkeynes@864:         
nkeynes@864:         drawrect2d( tile_bounds, pvr2_scene.bounds[4] );
nkeynes@864:         
nkeynes@864:         glEnable( GL_DEPTH_TEST );
nkeynes@864:         glStencilMask( 0x01 );
nkeynes@864:         glStencilFunc( GL_ALWAYS, 0, 1 );
nkeynes@864:         glStencilOp( GL_KEEP,GL_INVERT, GL_KEEP );         
nkeynes@864:     }
nkeynes@864: }
nkeynes@864: 
nkeynes@1145: static void gl_render_bkgnd( struct polygon_struct *poly )
nkeynes@863: {
nkeynes@1154:     bind_texture(poly->tex_id);
nkeynes@1145:     render_set_tsp_context( poly->context[0], poly->context[1] );
nkeynes@1145:     glDisable( GL_DEPTH_TEST );
nkeynes@1145:     glBlendFunc( GL_ONE, GL_ZERO );
nkeynes@1145:     gl_draw_vertexes(poly);
nkeynes@1145:     glEnable( GL_DEPTH_TEST );
nkeynes@1145: }
nkeynes@1145: 
nkeynes@1154: void gl_render_triangle( struct polygon_struct *poly, int index )
nkeynes@1154: {
nkeynes@1154:     bind_texture(poly->tex_id);
nkeynes@1154:     render_set_tsp_context( poly->context[0], poly->context[1] );
nkeynes@1154:     glDrawArrays(GL_TRIANGLE_STRIP, poly->vertex_index + index, 3 );
nkeynes@1154: 
nkeynes@1154: }
nkeynes@1154: 
nkeynes@1145: void gl_render_tilelist( pvraddr_t tile_entry, gboolean set_depth )
nkeynes@1145: {
nkeynes@1145:     tileentryiter list;
nkeynes@1145: 
nkeynes@1145:     FOREACH_TILEENTRY(list, tile_entry) {
nkeynes@1145:         struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[TILEENTRYITER_POLYADDR(list)];
nkeynes@1145:         if( poly != NULL ) {
nkeynes@1145:             do {
nkeynes@1145:                 gl_render_poly(poly, set_depth);
nkeynes@1145:                 poly = poly->next;
nkeynes@1145:             } while( list.strip_count-- > 0 );
nkeynes@1145:         }
nkeynes@1145:     }
nkeynes@1145: }
nkeynes@1145: 
nkeynes@1145: /**
nkeynes@1145:  * Render the tilelist with depthbuffer updates only.
nkeynes@1145:  */
nkeynes@1145: static void gl_render_tilelist_depthonly( pvraddr_t tile_entry )
nkeynes@1145: {
nkeynes@1145:     tileentryiter list;
nkeynes@1145: 
nkeynes@1145:     FOREACH_TILEENTRY(list, tile_entry) {
nkeynes@1145:         struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[TILEENTRYITER_POLYADDR(list)];
nkeynes@1145:         if( poly != NULL ) {
nkeynes@1145:             do {
nkeynes@1145:                 render_set_base_context(poly->context[0],TRUE);
nkeynes@1145:                 gl_draw_vertexes(poly);
nkeynes@1145:                 poly = poly->next;
nkeynes@1145:             } while( list.strip_count-- > 0 );
nkeynes@1145:         }
nkeynes@1145:     }
nkeynes@1145: }
nkeynes@1145: 
nkeynes@1145: static void gl_render_modifier_tilelist( pvraddr_t tile_entry, uint32_t tile_bounds[] )
nkeynes@1145: {
nkeynes@1145:     tileentryiter list;
nkeynes@863: 
nkeynes@1145:     FOREACH_TILEENTRY(list, tile_entry ) {
nkeynes@1145:         struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[TILEENTRYITER_POLYADDR(list)];
nkeynes@1145:         if( poly != NULL ) {
nkeynes@1145:             do {
nkeynes@864:                 gl_render_modifier_polygon( poly, tile_bounds );
nkeynes@863:                 poly = poly->next;
nkeynes@1145:             } while( list.strip_count-- > 0 );
nkeynes@863:         }
nkeynes@863:     }
nkeynes@1232: }
nkeynes@1232: 
nkeynes@1232: 
nkeynes@1232: #ifdef HAVE_OPENGL_FIXEDFUNC
nkeynes@1232: void pvr2_scene_setup_fixed( GLfloat *viewMatrix )
nkeynes@1232: {
nkeynes@1232:     glLoadMatrixf(viewMatrix);
nkeynes@1236:     glEnable( GL_DEPTH_TEST );
nkeynes@1232:     
nkeynes@1232:     glEnable( GL_FOG );
nkeynes@1232:     glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);
nkeynes@1232:     glFogi(GL_FOG_MODE, GL_LINEAR);
nkeynes@1232:     glFogf(GL_FOG_START, 0.0);
nkeynes@1232:     glFogf(GL_FOG_END, 1.0);
nkeynes@1232: 
nkeynes@1232:     glEnable( GL_ALPHA_TEST );
nkeynes@1232:     glAlphaFunc( GL_GEQUAL, 0 );
nkeynes@1232: 
nkeynes@1232:     glEnable( GL_COLOR_SUM );
nkeynes@1232: 
nkeynes@1232:     glEnableClientState( GL_VERTEX_ARRAY );
nkeynes@1232:     glEnableClientState( GL_COLOR_ARRAY );
nkeynes@1232:     glEnableClientState( GL_TEXTURE_COORD_ARRAY );
nkeynes@1232:     glEnableClientState( GL_SECONDARY_COLOR_ARRAY );
nkeynes@1232:     glEnableClientState( GL_FOG_COORDINATE_ARRAY_EXT );
nkeynes@1232: 
nkeynes@1232:     /* Vertex array pointers */
nkeynes@1232:     glVertexPointer(3, GL_FLOAT, sizeof(struct vertex_struct), &pvr2_scene.vertex_array[0].x);
nkeynes@1232:     glColorPointer(4, GL_FLOAT, sizeof(struct vertex_struct), &pvr2_scene.vertex_array[0].rgba[0]);
nkeynes@1233:     glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex_struct), &pvr2_scene.vertex_array[0].u);
nkeynes@1232:     glSecondaryColorPointerEXT(3, GL_FLOAT, sizeof(struct vertex_struct), pvr2_scene.vertex_array[0].offset_rgba );
nkeynes@1232:     glFogCoordPointerEXT(GL_FLOAT, sizeof(struct vertex_struct), &pvr2_scene.vertex_array[0].offset_rgba[3] );
nkeynes@1232: }
nkeynes@1232: 
nkeynes@1232: void pvr2_scene_set_alpha_fixed( float alphaRef )
nkeynes@1232: {
nkeynes@1232:     glAlphaFunc( GL_GEQUAL, alphaRef );
nkeynes@1232: }
nkeynes@1232: 
nkeynes@1232: void pvr2_scene_cleanup_fixed()
nkeynes@1232: {
nkeynes@1232:     glDisable( GL_COLOR_SUM );
nkeynes@1232:     glDisable( GL_FOG );
nkeynes@1232:     glDisable( GL_ALPHA_TEST );
nkeynes@1236:     glDisable( GL_DEPTH_TEST );
nkeynes@1232: 
nkeynes@1232:     glDisableClientState( GL_VERTEX_ARRAY );
nkeynes@1232:     glDisableClientState( GL_COLOR_ARRAY );
nkeynes@1232:     glDisableClientState( GL_TEXTURE_COORD_ARRAY );
nkeynes@1232:     glDisableClientState( GL_SECONDARY_COLOR_ARRAY );
nkeynes@1232:     glDisableClientState( GL_FOG_COORDINATE_ARRAY_EXT );
nkeynes@1236: 
nkeynes@1232: }
nkeynes@1232: #else
nkeynes@1232: void pvr2_scene_setup_fixed( GLfloat *viewMatrix, float alphaRef )
nkeynes@1232: {
nkeynes@1232: }
nkeynes@1232: void pvr2_scene_set_alpha_fixed( float alphaRef )
nkeynes@1232: {
nkeynes@1232: }
nkeynes@1232: void pvr2_scene_cleanup_fixed()
nkeynes@1232: {
nkeynes@1232: }
nkeynes@1232: #endif
nkeynes@1232: 
nkeynes@1232: void pvr2_scene_setup_shader( GLfloat *viewMatrix )
nkeynes@1232: {
nkeynes@1236:     glEnable( GL_DEPTH_TEST );
nkeynes@1236: 
nkeynes@1232:     glsl_use_pvr2_shader();
nkeynes@1232:     glsl_set_pvr2_shader_view_matrix(viewMatrix);
nkeynes@1232:     glsl_set_pvr2_shader_fog_colour1(pvr2_scene.fog_vert_colour);
nkeynes@1232:     glsl_set_pvr2_shader_fog_colour2(pvr2_scene.fog_lut_colour);
nkeynes@1232:     glsl_set_pvr2_shader_in_vertex_vec3_pointer(&pvr2_scene.vertex_array[0].x, sizeof(struct vertex_struct));
nkeynes@1232:     glsl_set_pvr2_shader_in_colour_pointer(&pvr2_scene.vertex_array[0].rgba[0], sizeof(struct vertex_struct));
nkeynes@1232:     glsl_set_pvr2_shader_in_colour2_pointer(&pvr2_scene.vertex_array[0].offset_rgba[0], sizeof(struct vertex_struct));
nkeynes@1232:     glsl_set_pvr2_shader_in_texcoord_pointer(&pvr2_scene.vertex_array[0].u, sizeof(struct vertex_struct));
nkeynes@1232:     glsl_set_pvr2_shader_alpha_ref(0.0);
nkeynes@1232:     glsl_set_pvr2_shader_primary_texture(0);
nkeynes@1232:     glsl_set_pvr2_shader_palette_texture(1);
nkeynes@1232: }
nkeynes@1232: 
nkeynes@1232: void pvr2_scene_cleanup_shader( )
nkeynes@1232: {
nkeynes@1232:     glsl_clear_shader();
nkeynes@1236: 
nkeynes@1236:     glDisable( GL_DEPTH_TEST );
nkeynes@1232: }
nkeynes@1232: 
nkeynes@1232: void pvr2_scene_set_alpha_shader( float alphaRef )
nkeynes@1232: {
nkeynes@1232:     glsl_set_pvr2_shader_alpha_ref(alphaRef);
nkeynes@639: }
nkeynes@639: 
nkeynes@639: /**
nkeynes@639:  * Render the currently defined scene in pvr2_scene
nkeynes@639:  */
nkeynes@639: void pvr2_scene_render( render_buffer_t buffer )
nkeynes@639: {
nkeynes@639:     /* Scene setup */
nkeynes@645:     struct timeval start_tv, tex_tv, end_tv;
nkeynes@1232:     int i;
nkeynes@1232:     GLfloat viewMatrix[16];
nkeynes@1232:     uint32_t clip_bounds[4];
nkeynes@1232: 
nkeynes@645: 
nkeynes@645:     gettimeofday(&start_tv, NULL);
nkeynes@639:     display_driver->set_render_target(buffer);
nkeynes@639:     pvr2_check_palette_changed();
nkeynes@645:     pvr2_scene_load_textures();
nkeynes@1154:     currentTexId = -1;
nkeynes@736: 
nkeynes@645:     gettimeofday( &tex_tv, NULL );
nkeynes@645:     uint32_t ms = (tex_tv.tv_sec - start_tv.tv_sec) * 1000 +
nkeynes@736:     (tex_tv.tv_usec - start_tv.tv_usec)/1000;
nkeynes@1232:     DEBUG( "Texture load in %dms", ms );
nkeynes@639: 
nkeynes@1232:     float alphaRef = ((float)(MMIO_READ(PVR2, RENDER_ALPHA_REF)&0xFF)+1)/256.0;
nkeynes@639:     float nearz = pvr2_scene.bounds[4];
nkeynes@639:     float farz = pvr2_scene.bounds[5];
nkeynes@639:     if( nearz == farz ) {
nkeynes@687:         farz*= 4.0;
nkeynes@639:     }
nkeynes@1232: 
nkeynes@1232:     /* Generate integer clip boundaries */
nkeynes@1232:     for( i=0; i<4; i++ ) {
nkeynes@1232:         clip_bounds[i] = (uint32_t)pvr2_scene.bounds[i];
nkeynes@1232:     }
nkeynes@1232: 
nkeynes@1236:     defineOrthoMatrix(viewMatrix, pvr2_scene.buffer_width, pvr2_scene.buffer_height, -farz, -nearz);
nkeynes@1232: 
nkeynes@1232:     if( have_shaders ) {
nkeynes@1232:         pvr2_scene_setup_shader(viewMatrix);
nkeynes@1232:     } else {
nkeynes@1232:         pvr2_scene_setup_fixed(viewMatrix);
nkeynes@1232:     }
nkeynes@1232: 
nkeynes@639: 
nkeynes@639:     /* Clear the buffer (FIXME: May not want always want to do this) */
nkeynes@639:     glDisable( GL_SCISSOR_TEST );
nkeynes@651:     glDepthMask( GL_TRUE );
nkeynes@864:     glStencilMask( 0x03 );
nkeynes@639:     glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );
nkeynes@639: 
nkeynes@687:     /* Render the background */
nkeynes@687:     gl_render_bkgnd( pvr2_scene.bkgnd_poly );
nkeynes@736: 
nkeynes@639:     glEnable( GL_SCISSOR_TEST );
nkeynes@1138:     glEnable( GL_TEXTURE_2D );
nkeynes@639: 
nkeynes@1232:     struct tile_segment *segment;
nkeynes@639: 
nkeynes@1232: #define FOREACH_SEGMENT(segment) \
nkeynes@1232:     segment = pvr2_scene.segment_list; \
nkeynes@1232:     do { \
nkeynes@1232:         int tilex = SEGMENT_X(segment->control); \
nkeynes@1232:         int tiley = SEGMENT_Y(segment->control); \
nkeynes@1232:         \
nkeynes@1232:         uint32_t tile_bounds[4] = { tilex << 5, (tilex+1)<<5, tiley<<5, (tiley+1)<<5 }; \
nkeynes@1232:         if( !clip_tile_bounds(tile_bounds, clip_bounds) ) { \
nkeynes@1232:             continue; \
nkeynes@736:         }
nkeynes@1232: #define END_FOREACH_SEGMENT() \
nkeynes@1232:     } while( !IS_LAST_SEGMENT(segment++) );
nkeynes@1232: #define CLIP_TO_SEGMENT() \
nkeynes@1232:     glScissor( tile_bounds[0], pvr2_scene.buffer_height-tile_bounds[3], tile_bounds[1]-tile_bounds[0], tile_bounds[3] - tile_bounds[2] )
nkeynes@736: 
nkeynes@1232:     /* Build up the opaque stencil map */
nkeynes@1232:     if( display_driver->capabilities.stencil_bits >= 2 ) {
nkeynes@1232:         glColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE );
nkeynes@1232:         FOREACH_SEGMENT(segment)
nkeynes@1232:             if( IS_NONEMPTY_TILE_LIST(segment->opaquemod_ptr) ) {
nkeynes@1232:                 CLIP_TO_SEGMENT();
nkeynes@1232:                 gl_render_tilelist_depthonly(segment->opaque_ptr);
nkeynes@1232:             }
nkeynes@1232:         END_FOREACH_SEGMENT()
nkeynes@1153: 
nkeynes@1232:         glEnable( GL_STENCIL_TEST );
nkeynes@1232:         glStencilFunc( GL_ALWAYS, 0, 1 );
nkeynes@1232:         glStencilOp( GL_KEEP,GL_INVERT, GL_KEEP );
nkeynes@1232:         glStencilMask( 0x01 );
nkeynes@1232:         glDepthFunc( GL_LEQUAL );
nkeynes@1232:         glDepthMask( GL_FALSE );
nkeynes@1232:         FOREACH_SEGMENT(segment)
nkeynes@1232:             if( IS_NONEMPTY_TILE_LIST(segment->opaquemod_ptr) ) {
nkeynes@1232:                 CLIP_TO_SEGMENT();
nkeynes@1232:                 gl_render_modifier_tilelist(segment->opaquemod_ptr, tile_bounds);
nkeynes@1232:             }
nkeynes@1232:         END_FOREACH_SEGMENT()
nkeynes@1232:         glDepthMask( GL_TRUE );
nkeynes@1232:         glStencilOp( GL_KEEP, GL_KEEP, GL_KEEP );
nkeynes@1232:         glDisable( GL_SCISSOR_TEST );
nkeynes@1232:         glClear( GL_DEPTH_BUFFER_BIT );
nkeynes@1232:         glEnable( GL_SCISSOR_TEST );
nkeynes@1232:         glColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE );
nkeynes@1232:     }
nkeynes@1232: 
nkeynes@1232:     /* Render the opaque polygons */
nkeynes@1232:     FOREACH_SEGMENT(segment)
nkeynes@1232:         CLIP_TO_SEGMENT();
nkeynes@1153:         gl_render_tilelist(segment->opaque_ptr,TRUE);
nkeynes@1232:     END_FOREACH_SEGMENT()
nkeynes@1236:     glDisable( GL_STENCIL_TEST );
nkeynes@1133: 
nkeynes@1232:     /* Render the punch-out polygons */
nkeynes@1232:     if( have_shaders )
nkeynes@1232:         pvr2_scene_set_alpha_shader(alphaRef);
nkeynes@1232:     else
nkeynes@1232:         pvr2_scene_set_alpha_fixed(alphaRef);
nkeynes@1232:     glDepthFunc(GL_GEQUAL);
nkeynes@1232:     FOREACH_SEGMENT(segment)
nkeynes@1232:         CLIP_TO_SEGMENT();
nkeynes@1232:         gl_render_tilelist(segment->punchout_ptr, FALSE );
nkeynes@1232:     END_FOREACH_SEGMENT()
nkeynes@1232:     if( have_shaders )
nkeynes@1232:         pvr2_scene_set_alpha_shader(0.0);
nkeynes@1232:     else
nkeynes@1232:         pvr2_scene_set_alpha_fixed(0.0);
nkeynes@1232: 
nkeynes@1232:     /* Render the translucent polygons */
nkeynes@1232:     FOREACH_SEGMENT(segment)
nkeynes@1232:         if( IS_NONEMPTY_TILE_LIST(segment->trans_ptr) ) {
nkeynes@1232:             CLIP_TO_SEGMENT();
nkeynes@736:             if( pvr2_scene.sort_mode == SORT_NEVER || 
nkeynes@736:                     (pvr2_scene.sort_mode == SORT_TILEFLAG && (segment->control&SEGMENT_SORT_TRANS))) {
nkeynes@1137:                 gl_render_tilelist(segment->trans_ptr, TRUE);
nkeynes@736:             } else {
nkeynes@736:                 render_autosort_tile(segment->trans_ptr, RENDER_NORMAL );
nkeynes@736:             }
nkeynes@736:         }
nkeynes@1232:     END_FOREACH_SEGMENT()
nkeynes@1232: 
nkeynes@639:     glDisable( GL_SCISSOR_TEST );
nkeynes@1232: 
nkeynes@1232:     if( have_shaders ) {
nkeynes@1232:         pvr2_scene_cleanup_shader();
nkeynes@1232:     } else {
nkeynes@1232:         pvr2_scene_cleanup_fixed();
nkeynes@1232:     }
nkeynes@669: 
nkeynes@1159:     pvr2_scene_finished();
nkeynes@1159: 
nkeynes@645:     gettimeofday( &end_tv, NULL );
nkeynes@645:     ms = (end_tv.tv_sec - tex_tv.tv_sec) * 1000 +
nkeynes@736:     (end_tv.tv_usec - tex_tv.tv_usec)/1000;
nkeynes@645:     DEBUG( "Scene render in %dms", ms );
nkeynes@639: }