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-rw-r--r--progs/demos/Makefile7
-rw-r--r--progs/demos/fslight.c208
2 files changed, 173 insertions, 42 deletions
diff --git a/progs/demos/Makefile b/progs/demos/Makefile
index 4623d6c8d91..6369746f008 100644
--- a/progs/demos/Makefile
+++ b/progs/demos/Makefile
@@ -113,6 +113,10 @@ trackball.o: trackball.c trackball.h
$(CC) -c -I$(INCDIR) $(CFLAGS) trackball.c
+extfuncs.h: $(TOP)/progs/util/extfuncs.h
+ cp $< .
+
+
reflect: reflect.o showbuffer.o readtex.o
$(CC) -I$(INCDIR) $(CFLAGS) reflect.o showbuffer.o readtex.o $(APP_LIB_DEPS) -o $@
@@ -141,6 +145,9 @@ engine.o: engine.c trackball.h
$(CC) -c -I$(INCDIR) $(CFLAGS) engine.c
+fslight.c: extfuncs.h
+
+
clean:
-rm -f $(PROGS)
-rm -f *.o *~
diff --git a/progs/demos/fslight.c b/progs/demos/fslight.c
index 1c016cc75e9..e1816485839 100644
--- a/progs/demos/fslight.c
+++ b/progs/demos/fslight.c
@@ -20,6 +20,10 @@
#include <GL/gl.h>
#include <GL/glut.h>
#include <GL/glext.h>
+#include "extfuncs.h"
+
+static char *FragProgFile = NULL;
+static char *VertProgFile = NULL;
static GLfloat diffuse[4] = { 0.5f, 0.5f, 1.0f, 1.0f };
static GLfloat specular[4] = { 0.8f, 0.8f, 0.8f, 1.0f };
@@ -35,7 +39,7 @@ static GLint uDiffuse;
static GLint uSpecular;
static GLint win = 0;
-static GLboolean anim = GL_TRUE;
+static GLboolean anim = GL_FALSE;
static GLboolean wire = GL_FALSE;
static GLboolean pixelLight = GL_TRUE;
@@ -44,23 +48,6 @@ static GLint frames = 0;
static GLfloat xRot = 0.0f, yRot = 0.0f;
-static PFNGLCREATESHADERPROC glCreateShader_func = NULL;
-static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL;
-static PFNGLGETSHADERSOURCEPROC glGetShaderSource_func = NULL;
-static PFNGLCOMPILESHADERPROC glCompileShader_func = NULL;
-static PFNGLCREATEPROGRAMPROC glCreateProgram_func = NULL;
-static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
-static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
-static PFNGLATTACHSHADERPROC glAttachShader_func = NULL;
-static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL;
-static PFNGLUSEPROGRAMPROC glUseProgram_func = NULL;
-static PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation_func = NULL;
-static PFNGLISPROGRAMPROC glIsProgram_func = NULL;
-static PFNGLISSHADERPROC glIsShader_func = NULL;
-static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL;
-static PFNGLUNIFORM3FVPROC glUniform4fv_func = NULL;
-
-
static void
normalize(GLfloat *dst, const GLfloat *src)
@@ -217,6 +204,131 @@ SpecialKey(int key, int x, int y)
static void
+TestFunctions(void)
+{
+ printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+ {
+ GLfloat pos[3];
+ glUniform3fv_func(uLightPos, 1, lightPos);
+ glGetUniformfv_func(program, uLightPos, pos);
+ printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+ printf("Light pos %g %g %g\n", pos[0], pos[1], pos[2]);
+ }
+
+
+ {
+ GLfloat m[16], result[16];
+ GLint mPos;
+ int i;
+
+ for (i = 0; i < 16; i++)
+ m[i] = (float) i;
+
+ mPos = glGetUniformLocation_func(program, "m");
+ printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+ glUniformMatrix4fv_func(mPos, 1, GL_FALSE, m);
+ printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+
+ glGetUniformfv_func(program, mPos, result);
+ printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+
+ for (i = 0; i < 16; i++) {
+ printf("%8g %8g\n", m[i], result[i]);
+ }
+ }
+
+ assert(glIsProgram_func(program));
+ assert(glIsShader_func(fragShader));
+ assert(glIsShader_func(vertShader));
+
+ /* attached shaders */
+ {
+ GLuint shaders[20];
+ GLsizei count;
+ int i;
+ glGetAttachedShaders_func(program, 20, &count, shaders);
+ for (i = 0; i < count; i++) {
+ printf("Attached: %u\n", shaders[i]);
+ assert(shaders[i] == fragShader ||
+ shaders[i] == vertShader);
+ }
+ }
+
+ {
+ GLchar log[1000];
+ GLsizei len;
+ glGetShaderInfoLog_func(vertShader, 1000, &len, log);
+ printf("Vert Shader Info Log: %s\n", log);
+ glGetShaderInfoLog_func(fragShader, 1000, &len, log);
+ printf("Frag Shader Info Log: %s\n", log);
+ glGetProgramInfoLog_func(program, 1000, &len, log);
+ printf("Program Info Log: %s\n", log);
+ }
+}
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+ GLint stat;
+
+ glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+ glCompileShader_func(shader);
+
+ glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+ if (!stat) {
+ GLchar log[1000];
+ GLsizei len;
+ glGetShaderInfoLog_func(shader, 1000, &len, log);
+ fprintf(stderr, "Problem compiling shader: %s\n", log);
+ exit(1);
+ }
+}
+
+
+/**
+ * Read a shader from a file.
+ */
+static void
+ReadShader(GLuint shader, const char *filename)
+{
+ const int max = 100*1000;
+ int n;
+ char *buffer = (char*) malloc(max);
+ FILE *f = fopen(filename, "r");
+ if (!f) {
+ fprintf(stderr, "Unable to open shader file %s\n", filename);
+ exit(1);
+ }
+
+ n = fread(buffer, 1, max, f);
+ printf("Read %d bytes from shader file %s\n", n, filename);
+ if (n > 0) {
+ buffer[n] = 0;
+ LoadAndCompileShader(shader, buffer);
+ }
+
+ fclose(f);
+ free(buffer);
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+ GLint stat;
+ glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+ if (!stat) {
+ GLchar log[1000];
+ GLsizei len;
+ glGetProgramInfoLog_func(prog, 1000, &len, log);
+ fprintf(stderr, "Linker error:\n%s\n", log);
+ }
+}
+
+
+static void
Init(void)
{
static const char *fragShaderText =
@@ -236,8 +348,6 @@ Init(void)
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" normal = gl_NormalMatrix * gl_Normal;\n"
"}\n";
-
-
const char *version;
version = (const char *) glGetString(GL_VERSION);
@@ -246,40 +356,33 @@ Init(void)
/*exit(1);*/
}
-
- glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader");
- glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
- glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
- glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource");
- glGetShaderSource_func = (PFNGLGETSHADERSOURCEPROC) glutGetProcAddress("glGetShaderSource");
- glCompileShader_func = (PFNGLCOMPILESHADERPROC) glutGetProcAddress("glCompileShader");
- glCreateProgram_func = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress("glCreateProgram");
- glAttachShader_func = (PFNGLATTACHSHADERPROC) glutGetProcAddress("glAttachShader");
- glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram");
- glUseProgram_func = (PFNGLUSEPROGRAMPROC) glutGetProcAddress("glUseProgram");
- glGetUniformLocation_func = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress("glGetUniformLocation");
- glIsProgram_func = (PFNGLISPROGRAMPROC) glutGetProcAddress("glIsProgram");
- glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader");
- glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv");
- glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv");
+ GetExtensionFuncs();
fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
- glShaderSource_func(fragShader, 1, &fragShaderText, NULL);
- glCompileShader_func(fragShader);
+ if (FragProgFile)
+ ReadShader(fragShader, FragProgFile);
+ else
+ LoadAndCompileShader(fragShader, fragShaderText);
+
vertShader = glCreateShader_func(GL_VERTEX_SHADER);
- glShaderSource_func(vertShader, 1, &vertShaderText, NULL);
- glCompileShader_func(vertShader);
+ if (VertProgFile)
+ ReadShader(vertShader, VertProgFile);
+ else
+ LoadAndCompileShader(vertShader, vertShaderText);
program = glCreateProgram_func();
glAttachShader_func(program, fragShader);
glAttachShader_func(program, vertShader);
glLinkProgram_func(program);
+ CheckLink(program);
glUseProgram_func(program);
uLightPos = glGetUniformLocation_func(program, "lightPos");
uDiffuse = glGetUniformLocation_func(program, "diffuse");
uSpecular = glGetUniformLocation_func(program, "specular");
+ printf("LightPos %d DiffusePos %d SpecularPos %d\n",
+ uLightPos, uDiffuse, uSpecular);
glUniform4fv_func(uDiffuse, 1, diffuse);
glUniform4fv_func(uSpecular, 1, specular);
@@ -296,7 +399,7 @@ Init(void)
printf("Press p to toggle between per-pixel and per-vertex lighting\n");
/* test glGetShaderSource() */
- {
+ if (0) {
GLsizei len = strlen(fragShaderText) + 1;
GLsizei lenOut;
GLchar *src =(GLchar *) malloc(len * sizeof(GLchar));
@@ -310,6 +413,26 @@ Init(void)
assert(glIsProgram_func(program));
assert(glIsShader_func(fragShader));
assert(glIsShader_func(vertShader));
+
+ glColor3f(1, 0, 0);
+#if 0
+ TestFunctions();
+#endif
+}
+
+
+static void
+ParseOptions(int argc, char *argv[])
+{
+ int i;
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-fs") == 0) {
+ FragProgFile = argv[i+1];
+ }
+ else if (strcmp(argv[i], "-vs") == 0) {
+ VertProgFile = argv[i+1];
+ }
+ }
}
@@ -318,7 +441,7 @@ main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitWindowPosition( 0, 0);
- glutInitWindowSize(200, 200);
+ glutInitWindowSize(100, 100);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
win = glutCreateWindow(argv[0]);
glutReshapeFunc(Reshape);
@@ -327,6 +450,7 @@ main(int argc, char *argv[])
glutDisplayFunc(Redisplay);
if (anim)
glutIdleFunc(Idle);
+ ParseOptions(argc, argv);
Init();
glutMainLoop();
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 13:03:53 +0000