diff options
Diffstat (limited to 'progs/tests/floattex.c')
| -rw-r--r-- | progs/tests/floattex.c | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/progs/tests/floattex.c b/progs/tests/floattex.c deleted file mode 100644 index 39302ce3af..0000000000 --- a/progs/tests/floattex.c +++ /dev/null @@ -1,238 +0,0 @@ -/* - * Test floating point textures. - */ - - -#include <assert.h> -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include <GL/glew.h> -#include <GL/glut.h> -#include "extfuncs.h" -#include "readtex.h" -#include "shaderutil.h" - - -static const char *TexFile = "../images/arch.rgb"; - -static const char *FragShaderText = - "uniform sampler2D tex1; \n" - "void main() \n" - "{ \n" - " vec4 t = texture2D(tex1, gl_TexCoord[0].xy); \n" - " // convert from [-255,0] to [0,1] \n" - " gl_FragColor = t * (-1.0 / 255.0); \n" - "} \n"; - -static const char *VertShaderText = - "void main() \n" - "{ \n" - " gl_TexCoord[0] = gl_MultiTexCoord0; \n" - " gl_Position = ftransform(); \n" - "} \n"; - -static struct uniform_info Uniforms[] = { - { "tex1", 1, GL_SAMPLER_2D, { 0, 0, 0, 0 }, -1 }, - END_OF_UNIFORMS -}; - - -static GLuint Program; - - - -static GLboolean -CheckError( int line ) -{ - GLenum error = glGetError(); - if (error) { - char *err = (char *) gluErrorString( error ); - fprintf( stderr, "GL Error: %s at line %d\n", err, line ); - return GL_TRUE; - } - return GL_FALSE; -} - - -static void -Draw(void) -{ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - glPushMatrix(); - - glBegin(GL_POLYGON); - glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, -1.0 ); - glTexCoord2f( 1.0, 0.0 ); glVertex2f( 1.0, -1.0 ); - glTexCoord2f( 1.0, 1.0 ); glVertex2f( 1.0, 1.0 ); - glTexCoord2f( 0.0, 1.0 ); glVertex2f( -1.0, 1.0 ); - glEnd(); - - glPopMatrix(); - - glutSwapBuffers(); -} - - -static void -Reshape(int width, int height) -{ - glViewport(0, 0, width, height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0.0, 0.0, -8.0); -} - - -static void -Key(unsigned char key, int x, int y) -{ - (void) x; - (void) y; - switch (key) { - case 27: - exit(0); - break; - } - glutPostRedisplay(); -} - - -static void -InitTexture(void) -{ - GLenum filter = GL_LINEAR; - GLint imgWidth, imgHeight; - GLenum imgFormat; - GLubyte *image = NULL; - GLfloat *ftex; - GLint i, t; - - image = LoadRGBImage(TexFile, &imgWidth, &imgHeight, &imgFormat); - if (!image) { - printf("Couldn't read %s\n", TexFile); - exit(0); - } - - assert(imgFormat == GL_RGB); - - ftex = (float *) malloc(imgWidth * imgHeight * 4 * sizeof(float)); - if (!ftex) { - printf("out of memory\n"); - exit(0); - } - - /* convert ubytes to floats, negated */ - for (i = 0; i < imgWidth * imgHeight * 3; i++) { - ftex[i] = -1.0f * image[i]; - } - - glActiveTexture(GL_TEXTURE0); - glBindTexture(GL_TEXTURE_2D, 42); - - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, - imgWidth, imgHeight, 0, - GL_RGB, GL_FLOAT, ftex); - - - CheckError(__LINE__); - - /* sanity checks */ - glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_TYPE_ARB, &t); - assert(t == GL_FLOAT); - glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_TYPE_ARB, &t); - assert(t == GL_FLOAT); - glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_TYPE_ARB, &t); - assert(t == GL_FLOAT); - glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_TYPE_ARB, &t); - assert(t == GL_FLOAT); - - free(image); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter); - - if (1) { - /* read back the texture and make sure values are correct */ - GLfloat *tex2 = (GLfloat *) - malloc(imgWidth * imgHeight * 4 * sizeof(GLfloat)); - glGetTexImage(GL_TEXTURE_2D, 0, imgFormat, GL_FLOAT, tex2); - CheckError(__LINE__); - for (i = 0; i < imgWidth * imgHeight * 4; i++) { - if (ftex[i] != tex2[i]) { - printf("tex[%d] %g != tex2[%d] %g\n", - i, ftex[i], i, tex2[i]); - } - } - } - - free(ftex); -} - - -static GLuint -CreateProgram(void) -{ - GLuint fragShader, vertShader, program; - - vertShader = CompileShaderText(GL_VERTEX_SHADER, VertShaderText); - fragShader = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderText); - assert(vertShader); - program = LinkShaders(vertShader, fragShader); - - assert(program); - - glUseProgram_func(program); - - SetUniformValues(program, Uniforms); - - return program; -} - - -static void -Init(void) -{ - glClearColor(0.25, 0.25, 0.25, 0.0); - - GetExtensionFuncs(); - - if (!ShadersSupported()) { - printf("Sorry, this test requires GLSL\n"); - exit(1); - } - - if (!glutExtensionSupported("GL_MESAX_texture_float") && - !glutExtensionSupported("GL_ARB_texture_float")) { - printf("Sorry, this test requires GL_MESAX/ARB_texture_float\n"); - exit(1); - } - - InitTexture(); - - Program = CreateProgram(); - glUseProgram_func(Program); -} - - -int -main(int argc, char *argv[]) -{ - glutInit(&argc, argv); - glutInitWindowPosition(0, 0); - glutInitWindowSize(400, 400); - glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); - glutCreateWindow(argv[0]); - glewInit(); - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutDisplayFunc(Draw); - Init(); - glutMainLoop(); - return 0; -} |