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Implement Blur mode and embed shaders

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This commit is contained in:
Simon Robertshaw 2011-10-20 16:28:49 +01:00
parent 2b56d31610
commit 09d3cacf9c
3 changed files with 73 additions and 12 deletions
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13
includes/graphics.h
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@ -191,3 +191,16 @@ void ogl_blit(int x, int y, int w, int h, pixel *src, int pitch, int scale);
#endif
#endif
#ifdef INCLUDE_SHADERS
const char * fragment = "uniform sampler2D fireAlpha;\
void main () {\
vec4 texColor = texture2D(fireAlpha, gl_PointCoord);\
gl_FragColor = vec4(gl_Color.rgb, texColor.a*gl_Color.a);\
}";
const char * vertex = "void main(void)\
{\
gl_Position = ftransform();;\
gl_FrontColor = gl_Color;\
}";
#endif

9
src/elements/deut.c
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@ -73,11 +73,10 @@ int graphics_DEUT(GRAPHICS_FUNC_ARGS)
{
if(parts[i].life>=700)
{
*firea = 20;
*firer = *fireg = *fireb = 255;
*pixel_mode |= FIRE_ADD;
*pixel_mode &= ~PMODE;
*colr += parts[i].life*1;
*colg += parts[i].life*2;
*colb += parts[i].life*3;
*pixel_mode |= PMODE_GLOW;
}
else
{

63
src/graphics.c
View File

@ -15,6 +15,7 @@
#include <defines.h>
#include <air.h>
#include <powder.h>
#define INCLUDE_SHADERS
#include <graphics.h>
#include <powdergraphics.h>
#define INCLUDE_FONTDATA
@ -26,7 +27,7 @@ unsigned cmode = CM_FIRE;
SDL_Surface *sdl_scrn;
int sdl_scale = 1;
GLuint vidBuf, airBuf, fireAlpha, glowAlpha, fireProg;
GLuint vidBuf, airBuf, fireAlpha, glowAlpha, blurAlpha, fireProg;
int sandcolour_r = 0;
int sandcolour_g = 0;
@ -1824,7 +1825,7 @@ void render_parts(pixel *vid)
// -- END FLAT -- //
}
if(cglow)
if(cglow || cblur)
{
// -- BEGIN GLOW -- //
//Start and prepare fire program
@ -1846,12 +1847,27 @@ void render_parts(pixel *vid)
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glColorPointer(4, GL_FLOAT, 0, &glowC[0]);
glVertexPointer(2, GL_INT, 0, &glowV[0]);
glDrawArrays(GL_POINTS, 0, cglow);
if(cglow)
{
glColorPointer(4, GL_FLOAT, 0, &glowC[0]);
glVertexPointer(2, GL_INT, 0, &glowV[0]);
glDrawArrays(GL_POINTS, 0, cglow);
}
glPointSize(7.0f);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
if(cblur)
{
glBindTexture(GL_TEXTURE_2D, blurAlpha);
glColorPointer(4, GL_FLOAT, 0, &blurC[0]);
glVertexPointer(2, GL_INT, 0, &blurV[0]);
glDrawArrays(GL_POINTS, 0, cblur);
}
//Clear some stuff we set
glDisable(GL_POINT_SPRITE);
@ -2432,6 +2448,7 @@ void prepare_alpha(int size, float intensity)
float temp[CELL*3][CELL*3];
float fire_alphaf[CELL*3][CELL*3];
float glow_alphaf[11][11];
float blur_alphaf[7][7];
memset(temp, 0, sizeof(temp));
for (x=0; x<CELL; x++)
for (y=0; y<CELL; y++)
@ -2482,6 +2499,27 @@ void prepare_alpha(int size, float intensity)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 11, 11, GL_ALPHA, GL_FLOAT, glow_alphaf);
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
c = 3;
for (x=-3; x<4; x++)
{
for (y=-3; y<4; y++)
{
if (abs(x)+abs(y) <2 && !(abs(x)==2||abs(y)==2))
blur_alphaf[c+x][c-y] = 0.11f;
if (abs(x)+abs(y) <=3 && abs(x)+abs(y))
blur_alphaf[c+x][c-y] = 0.08f;
if (abs(x)+abs(y) == 2)
blur_alphaf[c+x][c-y] = 0.04f;
}
}
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, blurAlpha);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 7, 7, GL_ALPHA, GL_FLOAT, blur_alphaf);
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
#endif
}
@ -3044,6 +3082,17 @@ int sdl_open(void)
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);
glGenTextures(1, &blurAlpha);
glBindTexture(GL_TEXTURE_2D, blurAlpha);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 7, 7, 0, GL_ALPHA, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
loadShaders();
#else
@ -3083,7 +3132,7 @@ int sdl_open(void)
void loadShaders()
{
GLuint vsize, fsize, vertexShader, fragmentShader;
const char *vertex = file_load("test.vert", &vsize), * fragment = file_load("test.frag", &fsize);
//const char *vertex = file_load("test.vert", &vsize), * fragment = file_load("test.frag", &fsize);
vertexShader = glCreateShader(GL_VERTEX_SHADER);
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);