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https://github.com/nzp-team/fteqw.git
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Post Processing to do waterwarp in hardware when glslang is available
Currently has some kind of bug causing a program link error with no message. gl_rmain.c added post processing code, for waterwarp gl_draw.c glquake.h initialises a texture number for use in post processing gl_vidcommon.c added function pointer for qglCopyTexImage2D and its intialisation glquake.h put Cl before Co in the defines of gl* to qgl* gl_rmain.c glquake.h gl_vidcommon.c added a function in gl_rmain.c to init the shaders for post processing, and called it from GL_CheckExtensions git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@769 fc73d0e0-1445-4013-8a0c-d673dee63da5
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KrimZon
parent
b192d3a175
commit
71ecb90233
4 changed files with 140 additions and 2 deletions
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@ -916,6 +916,8 @@ TRACE(("dbg: GLDraw_ReInit: Allocating upload buffers\n"));
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cs_texture = texture_extension_number++;
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cachedcrosshair=0;
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scenepp_texture = texture_extension_number++;
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start = Hunk_LowMark ();
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conback = default_conback;
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@ -135,9 +135,61 @@ cvar_t r_xflip = {"leftisright", "0"};
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extern cvar_t gl_ztrick;
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extern cvar_t scr_fov;
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// post processing stuff
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int scenepp_texture;
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int scenepp_ww_program;
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int scenepp_ww_parm_texturei;
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int scenepp_ww_parm_timef;
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int scenepp_ww_parm_xscalef;
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int scenepp_ww_parm_yscalef;
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int scenepp_ww_parm_ampscalef;
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// KrimZon - init post processing - called in GL_CheckExtensions, when they're called
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// I put it here so that only this file need be changed when messing with the post
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// processing shaders
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void GL_InitSceneProcessingShaders (void)
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{
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int vert, frag;
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char *genericvert = "\
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varying vec2 v_texCoord;\
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void main (void)\
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{\
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vec4 v = vec4( gl_Vertex.x, gl_Vertex.y, gl_Vertex.z, 1.0 );\
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gl_Position = gl_ModelViewProjectionMatrix * v;\
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v_texCoord = gl_MultiTexCoord0.xy;\
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}\
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";
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char *wwfrag = "\
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varying vec2 v_texCoord;\
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uniform sampler2D texture;\
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uniform float time;\
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uniform float xscale;\
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uniform float yscale;\
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uniform float ampscale;\
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void main (void)\
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{\
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v_texCoord.x = v_texCoord.x + sin((v_texCoord.y * xscale) + time) * ampscale;\
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v_texCoord.y = v_texCoord.y + cos((v_texCoord.x * xscale) + time) * ampscale;\
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gl_FragColor = texture2D( texture, v_texCoord );\
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}\
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";
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vert = GLSlang_CreateShader(genericvert, GL_VERTEX_SHADER_ARB);
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frag = GLSlang_CreateShader(wwfrag, GL_FRAGMENT_SHADER_ARB);
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scenepp_ww_program = GLSlang_CreateProgram(vert, frag);
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scenepp_ww_parm_texturei = GLSlang_GetUniformLocation(scenepp_ww_program, "texture");
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scenepp_ww_parm_timef = GLSlang_GetUniformLocation(scenepp_ww_program, "time");
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scenepp_ww_parm_xscalef = GLSlang_GetUniformLocation(scenepp_ww_program, "xscale");
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scenepp_ww_parm_yscalef = GLSlang_GetUniformLocation(scenepp_ww_program, "yscale");
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scenepp_ww_parm_ampscalef = GLSlang_GetUniformLocation(scenepp_ww_program, "ampscale");
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GLSlang_SetUniform1i(scenepp_ww_parm_texturei, 0);
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GLSlang_SetUniform1f(scenepp_ww_parm_ampscalef, 0.08);
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}
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/*
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=================
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@ -1692,6 +1744,83 @@ void GLR_RenderView (void)
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RQuantAdd(RQUANT_EPOLYS, c_alias_polys);
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// Con_Printf ("%3i ms %4i wpoly %4i epoly\n", (int)((time2-time1)*1000), c_brush_polys, c_alias_polys);
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}
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// SCENE POST PROCESSING
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// we check if we need to use any shaders - currently it's just waterwarp
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if ((gl_config.arb_shader_objects) && (r_waterwarp.value /*&& r_viewleaf->contents <= Q1CONTENTS_WATER*/))
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{
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float vwidth = 1, vheight = 1;
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float vs, vt;
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// get the powers of 2 for the size of the texture that will hold the scene
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while (vwidth < glwidth)
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{
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vwidth *= 2;
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}
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while (vheight < glheight)
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{
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vheight *= 2;
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}
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// get the texcoords while we're at it
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vs = glwidth - vwidth;
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vt = glheight - vheight;
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// 2d mode, but upside down to quake's normal 2d drawing
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// this makes grabbing the sreen a lot easier
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qglViewport (glx, gly, glwidth, glheight);
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qglMatrixMode(GL_PROJECTION);
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// Push the matrices to go into 2d mode, that matches opengl's mode
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qglPushMatrix();
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qglLoadIdentity ();
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// TODO: use actual window width and height
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qglOrtho (0, vid.width, 0, vid.height, -99999, 99999);
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qglMatrixMode(GL_MODELVIEW);
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qglPushMatrix();
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qglLoadIdentity ();
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qglDisable (GL_DEPTH_TEST);
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qglDisable (GL_CULL_FACE);
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qglDisable (GL_BLEND);
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qglEnable (GL_ALPHA_TEST);
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// copy the scene to texture
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GL_Bind(scenepp_texture);
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qglCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, glx, gly, vwidth, vheight, 0);
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// Here we apply the shaders - currently just waterwarp
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GLSlang_UseProgram(scenepp_ww_program);
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GLSlang_SetUniform1f(scenepp_ww_parm_xscalef, glwidth / 32.0f);
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GLSlang_SetUniform1f(scenepp_ww_parm_xscalef, glheight / 32.0f);
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GLSlang_SetUniform1f(scenepp_ww_parm_timef, cl.time);
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glBegin(GL_QUADS);
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glTexCoord2f(0, 0);
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glVertex2f(0, 0);
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glTexCoord2f(vs, 0);
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glVertex2f(vwidth, 0);
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glTexCoord2f(vs, vt);
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glVertex2f(vwidth, vheight);
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glTexCoord2f(0, vt);
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glVertex2f(0, vheight);
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glEnd();
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// Disable shaders
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GLSlang_UseProgram(NULL);
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// After all the post processing, pop the matrices
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qglMatrixMode(GL_PROJECTION);
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qglPopMatrix();
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qglMatrixMode(GL_MODELVIEW);
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qglPopMatrix();
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}
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}
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#endif
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@ -17,6 +17,7 @@ void (APIENTRY *qglColor4fv) (const GLfloat *v);
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void (APIENTRY *qglColor4ub) (GLubyte red, GLubyte green, GLubyte blue, GLubyte alpha);
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void (APIENTRY *qglColor4ubv) (const GLubyte *v);
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void (APIENTRY *qglColorMask) (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
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void (APIENTRY *qglCopyTexImage2D) (GLenum target, GLint level, GLenum internalFormat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
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void (APIENTRY *qglCullFace) (GLenum mode);
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void (APIENTRY *qglDepthFunc) (GLenum func);
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void (APIENTRY *qglDepthMask) (GLboolean flag);
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@ -336,6 +337,8 @@ void GL_CheckExtensions (void *(*getglfunction) (char *name))
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qglUniform4fARB = (void *)getglext("glUniform4fARB");
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qglUniform1iARB = (void *)getglext("glUniform1iARB");
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qglUniform1fARB = (void *)getglext("glUniform1fARB");
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GL_InitSceneProcessingShaders();
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}
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}
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@ -441,6 +444,7 @@ void GL_Init(void *(*getglfunction) (char *name))
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qglColor4ub = (void *)getglcore("glColor4ub");
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qglColor4ubv = (void *)getglcore("glColor4ubv");
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qglColorMask = (void *)getglcore("glColorMask");
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qglCopyTexImage2D = (void *)getglcore("glCopyTexImage2D");
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qglCullFace = (void *)getglcore("glCullFace");
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qglDepthFunc = (void *)getglcore("glDepthFunc");
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qglDepthMask = (void *)getglcore("glDepthMask");
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@ -287,6 +287,9 @@ qboolean R_CullSphere (vec3_t origin, float radius);
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void R_RotateForEntity (entity_t *e);
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void R_DrawAliasModel (entity_t *e);
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void GL_InitSceneProcessingShaders (void);
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extern int scenepp_texture;
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//gl_alias.c
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void R_DrawGAliasModel (entity_t *e);
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void R_DrawGAliasShadowVolume(entity_t *e, vec3_t lightpos, float radius);
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@ -749,13 +752,13 @@ extern PFNGLUNLOCKARRAYSEXTPROC qglUnlockArraysEXT;
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#define glAlphaFunc qglAlphaFunc
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#define glBlendFunc qglBlendFunc
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#define glBegin qglBegin
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#define glClearDepth qglClearDepth
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#define glClearStencil qglClearStencil
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#define glColor3f qglColor3f
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#define glColor4f qglColor4f
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#define glColor4ub qglColor4ub
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#define glColor4ubv qglColor4ubv
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#define glColorMask qglColorMask
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#define glClearDepth qglClearDepth
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#define glClearStencil qglClearStencil
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#define glDisable qglDisable
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#define glEnable qglEnable
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#define glEnd qglEnd
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