/*
* Test floating point textures.
- * No actual rendering, yet.
*/
#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"
-/* XXX - temporary */
-#ifndef GL_ARB_texture_float
-#define GL_ARB_texture_float 1
-#define GL_TEXTURE_RED_TYPE_ARB 0x9000
-#define GL_TEXTURE_GREEN_TYPE_ARB 0x9001
-#define GL_TEXTURE_BLUE_TYPE_ARB 0x9002
-#define GL_TEXTURE_ALPHA_TYPE_ARB 0x9003
-#define GL_TEXTURE_LUMINANCE_TYPE_ARB 0x9004
-#define GL_TEXTURE_INTENSITY_TYPE_ARB 0x9005
-#define GL_TEXTURE_DEPTH_TYPE_ARB 0x9006
-#define GL_UNSIGNED_NORMALIZED_ARB 0x9007
-#define GL_RGBA32F_ARB 0x8814
-#define GL_RGB32F_ARB 0x8815
-#define GL_ALPHA32F_ARB 0x8816
-#define GL_INTENSITY32F_ARB 0x8817
-#define GL_LUMINANCE32F_ARB 0x8818
-#define GL_LUMINANCE_ALPHA32F_ARB 0x8819
-#define GL_RGBA16F_ARB 0x881A
-#define GL_RGB16F_ARB 0x881B
-#define GL_ALPHA16F_ARB 0x881C
-#define GL_INTENSITY16F_ARB 0x881D
-#define GL_LUMINANCE16F_ARB 0x881E
-#define GL_LUMINANCE_ALPHA16F_ARB 0x881F
-#endif
+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_INT, { 0, 0, 0, 0 }, -1 },
+ END_OF_UNIFORMS
+};
+
+
+static GLuint Program;
+
static GLboolean
glPushMatrix();
- glutSolidCube(2.0);
+ 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();
glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
- glTranslatef(0.0, 0.0, -15.0);
+ glTranslatef(0.0, 0.0, -8.0);
}
}
-
static void
-Init(void)
+InitTexture(void)
{
- GLfloat tex[16][16][4];
- GLfloat tex2[16][16][4];
- GLint i, j, t;
+ 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);
+ }
- if (!glutExtensionSupported("GL_MESAX_texture_float")) {
- printf("Sorry, this test requires GL_MESAX_texture_float\n");
- exit(1);
+ assert(imgFormat == GL_RGB);
+
+ ftex = (float *) malloc(imgWidth * imgHeight * 4 * sizeof(float));
+ if (!ftex) {
+ printf("out of memory\n");
+ exit(0);
}
- for (i = 0; i < 16; i++) {
- for (j = 0; j < 16; j++) {
- GLfloat s = i / 15.0;
- tex[i][j][0] = s;
- tex[i][j][1] = 2.0 * s;
- tex[i][j][2] = -3.0 * s;
- tex[i][j][3] = 4.0 * s;
- }
+ /* convert ubytes to floats, negated */
+ for (i = 0; i < imgWidth * imgHeight * 3; i++) {
+ ftex[i] = -1.0f * image[i];
}
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, 16, 16, 0, GL_RGBA,
- GL_FLOAT, tex);
+ 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);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_TYPE_ARB, &t);
assert(t == GL_FLOAT);
- CheckError(__LINE__);
-
- /* read back the texture and make sure values are correct */
- glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_FLOAT, tex2);
- CheckError(__LINE__);
- for (i = 0; i < 16; i++) {
- for (j = 0; j < 16; j++) {
- if (tex[i][j][0] != tex2[i][j][0] ||
- tex[i][j][1] != tex2[i][j][1] ||
- tex[i][j][2] != tex2[i][j][2] ||
- tex[i][j][3] != tex2[i][j][3]) {
- printf("tex[%d][%d] %g %g %g %g != tex2[%d][%d] %g %g %g %g\n",
- i, j,
- tex[i][j][0], tex[i][j][1], tex[i][j][2], tex[i][j][3],
- i, j,
- tex2[i][j][0], tex2[i][j][1], tex2[i][j][2], tex2[i][j][3]);
+ 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);
+
+ InitUniforms(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);
}
glutInitWindowSize(400, 400);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow(argv[0]);
+ glewInit();
glutReshapeFunc(Reshape);
glutKeyboardFunc(Key);
glutDisplayFunc(Draw);
projects / mesa.git / blobdiff