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-rw-r--r--progs/glsl/CH11-bumpmaptex.frag47
-rw-r--r--progs/glsl/bump.c55
-rw-r--r--progs/glsl/deriv.c15
-rw-r--r--progs/tests/Makefile1
-rw-r--r--progs/tests/texleak.c140
5 files changed, 254 insertions, 4 deletions
diff --git a/progs/glsl/CH11-bumpmaptex.frag b/progs/glsl/CH11-bumpmaptex.frag
new file mode 100644
index 00000000000..b1f93b784d9
--- /dev/null
+++ b/progs/glsl/CH11-bumpmaptex.frag
@@ -0,0 +1,47 @@
+//
+// Fragment shader for procedural bumps
+//
+// Authors: John Kessenich, Randi Rost
+//
+// Copyright (c) 2002-2006 3Dlabs Inc. Ltd.
+//
+// See 3Dlabs-License.txt for license information
+//
+// Texture mapping/modulation added by Brian Paul
+//
+
+varying vec3 LightDir;
+varying vec3 EyeDir;
+
+uniform float BumpDensity; // = 16.0
+uniform float BumpSize; // = 0.15
+uniform float SpecularFactor; // = 0.5
+
+sampler2D Tex;
+
+void main()
+{
+ vec3 ambient = vec3(0.25);
+ vec3 litColor;
+ vec2 c = BumpDensity * gl_TexCoord[0].st;
+ vec2 p = fract(c) - vec2(0.5);
+
+ float d, f;
+ d = p.x * p.x + p.y * p.y;
+ f = inversesqrt(d + 1.0);
+
+ if (d >= BumpSize)
+ { p = vec2(0.0); f = 1.0; }
+
+ vec3 SurfaceColor = texture2D(Tex, gl_TexCoord[0].st).xyz;
+
+ vec3 normDelta = vec3(p.x, p.y, 1.0) * f;
+ litColor = SurfaceColor * (ambient + max(dot(normDelta, LightDir), 0.0));
+ vec3 reflectDir = reflect(LightDir, normDelta);
+
+ float spec = max(dot(EyeDir, reflectDir), 0.0);
+ spec *= SpecularFactor;
+ litColor = min(litColor + spec, vec3(1.0));
+
+ gl_FragColor = vec4(litColor, 1.0);
+}
diff --git a/progs/glsl/bump.c b/progs/glsl/bump.c
index 50a0900f1c7..e31afab9392 100644
--- a/progs/glsl/bump.c
+++ b/progs/glsl/bump.c
@@ -12,15 +12,20 @@
#include <GL/glew.h>
#include <GL/glut.h>
#include "shaderutil.h"
+#include "readtex.h"
static char *FragProgFile = "CH11-bumpmap.frag";
+static char *FragTexProgFile = "CH11-bumpmaptex.frag";
static char *VertProgFile = "CH11-bumpmap.vert";
+static char *TextureFile = "../images/tile.rgb";
/* program/shader objects */
static GLuint fragShader;
+static GLuint fragTexShader;
static GLuint vertShader;
static GLuint program;
+static GLuint texProgram;
static struct uniform_info Uniforms[] = {
@@ -32,13 +37,26 @@ static struct uniform_info Uniforms[] = {
END_OF_UNIFORMS
};
+static struct uniform_info TexUniforms[] = {
+ { "LightPosition", 1, GL_FLOAT_VEC3, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 },
+ { "Tex", 1, GL_INT, { 0, 0, 0, 0 }, -1 },
+ { "BumpDensity", 1, GL_FLOAT, { 10.0, 0, 0, 0 }, -1 },
+ { "BumpSize", 1, GL_FLOAT, { 0.125, 0, 0, 0 }, -1 },
+ { "SpecularFactor", 1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 },
+ END_OF_UNIFORMS
+};
+
static GLint win = 0;
static GLfloat xRot = 20.0f, yRot = 0.0f, zRot = 0.0f;
static GLint tangentAttrib;
+static GLint tangentAttribTex;
+
+static GLuint Texture;
static GLboolean Anim = GL_FALSE;
+static GLboolean Textured = GL_FALSE;
static void
@@ -135,6 +153,11 @@ Redisplay(void)
glRotatef(yRot, 0.0f, 1.0f, 0.0f);
glRotatef(zRot, 0.0f, 0.0f, 1.0f);
+ if (Textured)
+ glUseProgram(texProgram);
+ else
+ glUseProgram(program);
+
Cube(1.5);
glPopMatrix();
@@ -163,8 +186,10 @@ static void
CleanUp(void)
{
glDeleteShader(fragShader);
+ glDeleteShader(fragTexShader);
glDeleteShader(vertShader);
glDeleteProgram(program);
+ glDeleteProgram(texProgram);
glutDestroyWindow(win);
}
@@ -181,6 +206,9 @@ Key(unsigned char key, int x, int y)
Anim = !Anim;
glutIdleFunc(Anim ? Idle : NULL);
break;
+ case 't':
+ Textured = !Textured;
+ break;
case 'z':
zRot += step;
break;
@@ -254,6 +282,26 @@ Init(void)
CheckError(__LINE__);
+
+ /*
+ * As above, but fragment shader also uses a texture map.
+ */
+ fragTexShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragTexProgFile);
+ texProgram = LinkShaders(vertShader, fragTexShader);
+ glUseProgram(texProgram);
+ assert(glIsProgram(texProgram));
+ assert(glIsShader(fragTexShader));
+ SetUniformValues(texProgram, TexUniforms);
+ PrintUniforms(TexUniforms);
+
+ /*
+ * Load tex image.
+ */
+ glGenTextures(1, &Texture);
+ glBindTexture(GL_TEXTURE_2D, Texture);
+ LoadRGBMipmaps(TextureFile, GL_RGB);
+
+
glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
glEnable(GL_DEPTH_TEST);
@@ -268,10 +316,13 @@ ParseOptions(int argc, char *argv[])
int i;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-fs") == 0) {
- FragProgFile = argv[i+1];
+ FragProgFile = argv[++i];
}
else if (strcmp(argv[i], "-vs") == 0) {
- VertProgFile = argv[i+1];
+ VertProgFile = argv[++i];
+ }
+ else if (strcmp(argv[i], "-t") == 0) {
+ TextureFile = argv[++i];
}
}
}
diff --git a/progs/glsl/deriv.c b/progs/glsl/deriv.c
index 30f2b75fef7..588246b71ac 100644
--- a/progs/glsl/deriv.c
+++ b/progs/glsl/deriv.c
@@ -27,11 +27,15 @@ static GLuint SphereList, RectList, CurList;
static GLint win = 0;
static GLboolean anim = GL_TRUE;
static GLfloat xRot = 0.0f, yRot = 0.0f;
+static GLint WinSize[2];
+static GLint WinSizeUniform = -1;
static void
Redisplay(void)
{
+ glUniform2iv(WinSizeUniform, 1, WinSize);
+
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
@@ -55,6 +59,8 @@ Idle(void)
static void
Reshape(int width, int height)
{
+ WinSize[0] = width;
+ WinSize[1] = height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
@@ -163,8 +169,10 @@ static void
Init(void)
{
static const char *fragShaderText =
+ "uniform ivec2 WinSize; \n"
"void main() {\n"
- " gl_FragColor = abs(dFdy(gl_TexCoord[0])) * 50.0;\n"
+ " vec2 d = dFdy(gl_TexCoord[0].xy) * vec2(WinSize); \n"
+ " gl_FragColor = vec4(d.x, d.y, 0.0, 1.0);\n"
" // gl_FragColor = gl_TexCoord[0];\n"
"}\n";
static const char *vertShaderText =
@@ -181,6 +189,7 @@ Init(void)
program = LinkShaders(vertShader, fragShader);
glUseProgram(program);
+ WinSizeUniform = glGetUniformLocation(program, "WinSize");
/*assert(glGetError() == 0);*/
@@ -220,8 +229,10 @@ ParseOptions(int argc, char *argv[])
int
main(int argc, char *argv[])
{
+ WinSize[0] = WinSize[1] = 200;
+
glutInit(&argc, argv);
- glutInitWindowSize(200, 200);
+ glutInitWindowSize(WinSize[0], WinSize[1]);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
win = glutCreateWindow(argv[0]);
glewInit();
diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index 197e14d5b00..3e2541186b1 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -98,6 +98,7 @@ SOURCES = \
texdown \
texfilt.c \
texgenmix.c \
+ texleak.c \
texline.c \
texobj.c \
texobjshare.c \
diff --git a/progs/tests/texleak.c b/progs/tests/texleak.c
new file mode 100644
index 00000000000..5cf4ff32393
--- /dev/null
+++ b/progs/tests/texleak.c
@@ -0,0 +1,140 @@
+/*
+ * 'Texture leak' test
+ *
+ * Allocates and uses an additional texture of the maximum supported size for
+ * each frame. This tests the system's ability to cope with using increasing
+ * amounts of texture memory.
+ *
+ * Michel Dänzer July 2009 This program is in the public domain.
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+
+
+GLint size;
+GLvoid *image;
+static GLuint numTexObj;
+static GLuint *texObj;
+
+
+static void Idle( void )
+{
+ glutPostRedisplay();
+}
+
+
+static void DrawObject(void)
+{
+ static const GLfloat tex_coords[] = { 0.0, 0.0, 1.0, 1.0, 0.0 };
+ static const GLfloat vtx_coords[] = { -1.0, -1.0, 1.0, 1.0, -1.0 };
+ GLint i, j;
+
+ glEnable(GL_TEXTURE_2D);
+
+ for (i = 0; i < numTexObj; i++) {
+ glBindTexture(GL_TEXTURE_2D, texObj[i]);
+ glBegin(GL_QUADS);
+ for (j = 0; j < 4; j++ ) {
+ glTexCoord2f(tex_coords[j], tex_coords[j+1]);
+ glVertex2f( vtx_coords[j], vtx_coords[j+1] );
+ }
+ glEnd();
+ }
+}
+
+
+static void Display( void )
+{
+ struct timeval start, end;
+
+ texObj = realloc(texObj, ++numTexObj * sizeof(*texObj));
+
+ /* allocate a texture object */
+ glGenTextures(1, texObj + (numTexObj - 1));
+
+ glBindTexture(GL_TEXTURE_2D, texObj[numTexObj - 1]);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ memset(image, (16 * numTexObj) & 0xff, 4 * size * size);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size, size, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, image);
+
+ gettimeofday(&start, NULL);
+
+ glClear( GL_COLOR_BUFFER_BIT );
+
+ glPushMatrix();
+ glScalef(5.0, 5.0, 5.0);
+ DrawObject();
+ glPopMatrix();
+
+ glutSwapBuffers();
+
+ glFinish();
+ gettimeofday(&end, NULL);
+ printf("Rendering frame took %lu ms using %u MB of textures\n",
+ end.tv_sec * 1000 + end.tv_usec / 1000 - start.tv_sec * 1000 -
+ start.tv_usec / 1000, numTexObj * 4 * size / 1024 * size / 1024);
+
+ sleep(1);
+}
+
+
+static void Reshape( int width, int height )
+{
+ glViewport( 0, 0, width, height );
+ glMatrixMode( GL_PROJECTION );
+ glLoadIdentity();
+ glOrtho( -6.0, 6.0, -6.0, 6.0, 10.0, 100.0 );
+ glMatrixMode( GL_MODELVIEW );
+ glLoadIdentity();
+ glTranslatef( 0.0, 0.0, -70.0 );
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+ glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size);
+ printf("%d x %d max texture size\n", size, size);
+
+ image = malloc(4 * size * size);
+ if (!image) {
+ fprintf(stderr, "Failed to allocate %u bytes of memory\n", 4 * size * size);
+ exit(1);
+ }
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+ glShadeModel(GL_FLAT);
+ glClearColor(0.3, 0.3, 0.4, 1.0);
+
+ Idle();
+}
+
+
+int main( int argc, char *argv[] )
+{
+ glutInit( &argc, argv );
+ glutInitWindowSize( 300, 300 );
+ glutInitWindowPosition( 0, 0 );
+ glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+ glutCreateWindow(argv[0] );
+ glewInit();
+
+ Init( argc, argv );
+
+ glutReshapeFunc( Reshape );
+ glutDisplayFunc( Display );
+ glutIdleFunc(Idle);
+
+ glutMainLoop();
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 00:22:13 +0000