mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2026-05-09 15:28:04 +02:00
add dependent texture read test
This commit is contained in:
Keith Whitwell
parent
4a74de797c
commit
f10469abe8
2 changed files with 246 additions and 0 deletions
|
|
@ -40,6 +40,7 @@ SOURCES = \
|
|||
quad-tex-2d.c \
|
||||
quad-tex-pbo.c \
|
||||
quad-tex-3d.c \
|
||||
quad-tex-dep.c \
|
||||
quad.c \
|
||||
quads.c \
|
||||
quadstrip.c \
|
||||
|
|
|
|||
245
progs/trivial/quad-tex-dep.c
Normal file
245
progs/trivial/quad-tex-dep.c
Normal file
|
|
@ -0,0 +1,245 @@
|
|||
|
||||
#include <assert.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#define GL_GLEXT_PROTOTYPES
|
||||
#include <GL/glut.h>
|
||||
|
||||
|
||||
|
||||
GLenum doubleBuffer;
|
||||
|
||||
/* Demonstrate an equivalent to paletted texturing using fragment
|
||||
* programs and dependent texturing. This requires at least one
|
||||
* texture unit to be reserved for the palette lookup.
|
||||
*/
|
||||
|
||||
static void Init( void )
|
||||
{
|
||||
static const char *modulate2D =
|
||||
"!!ARBfp1.0\n"
|
||||
"TEMP index; \n"
|
||||
"TEX index, fragment.texcoord[0], texture[0], 2D; \n"
|
||||
"TEX result.color, index, texture[1], 1D; \n"
|
||||
"END"
|
||||
;
|
||||
GLuint modulateProg;
|
||||
GLuint Texture;
|
||||
|
||||
if (!glutExtensionSupported("GL_ARB_fragment_program")) {
|
||||
printf("Error: GL_ARB_fragment_program not supported!\n");
|
||||
exit(1);
|
||||
}
|
||||
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
|
||||
|
||||
/* Setup the fragment program */
|
||||
glGenProgramsARB(1, &modulateProg);
|
||||
glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, modulateProg);
|
||||
glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
|
||||
strlen(modulate2D), (const GLubyte *)modulate2D);
|
||||
|
||||
printf("glGetError = 0x%x\n", (int) glGetError());
|
||||
printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
|
||||
(char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
|
||||
assert(glIsProgramARB(modulateProg));
|
||||
|
||||
glEnable(GL_FRAGMENT_PROGRAM_ARB);
|
||||
|
||||
|
||||
{
|
||||
#define HEIGHT 8
|
||||
#define WIDTH 32
|
||||
|
||||
#define B 0
|
||||
#define G 1
|
||||
#define R 2
|
||||
#define A 3
|
||||
|
||||
static char texture[HEIGHT * WIDTH + 1] =
|
||||
" "
|
||||
" MMM EEEE SSS AAA "
|
||||
" M M M E S S A A "
|
||||
" M M M EEEE SS A A "
|
||||
" M M M E SS AAAAA "
|
||||
" M M E S S A A "
|
||||
" M M EEEE SSS A A ";
|
||||
|
||||
GLubyte table[256][4];
|
||||
|
||||
|
||||
|
||||
/* load the color table for each texel-index */
|
||||
memset(table, 0xff, 256*4);
|
||||
table[' '][B] = 255;
|
||||
table[' '][G] = 255;
|
||||
table[' '][R] = 255;
|
||||
table[' '][A] = 64;
|
||||
table['M'][B] = 0;
|
||||
table['M'][G] = 0;
|
||||
table['M'][R] = 255;
|
||||
table['M'][A] = 255;
|
||||
table['E'][B] = 0;
|
||||
table['E'][G] = 255;
|
||||
table['E'][R] = 0;
|
||||
table['E'][A] = 255;
|
||||
table['S'][B] = 255;
|
||||
table['S'][G] = 0;
|
||||
table['S'][R] = 0;
|
||||
table['S'][A] = 255;
|
||||
table['A'][B] = 0;
|
||||
table['A'][G] = 255;
|
||||
table['A'][R] = 255;
|
||||
table['A'][A] = 255;
|
||||
|
||||
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
||||
|
||||
|
||||
/* Load indexed texture as a 2D I8 texture */
|
||||
glActiveTextureARB(GL_TEXTURE0_ARB);
|
||||
glGenTextures(1, &Texture);
|
||||
glBindTexture(GL_TEXTURE_2D, Texture);
|
||||
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
||||
|
||||
glTexImage2D(GL_TEXTURE_2D, /* target */
|
||||
0, /* level */
|
||||
GL_INTENSITY, /* internal format */
|
||||
WIDTH, HEIGHT, /* width, height */
|
||||
0, /* border */
|
||||
GL_LUMINANCE, /* texture format */
|
||||
GL_UNSIGNED_BYTE, /* texture type */
|
||||
texture); /* the texture */
|
||||
|
||||
|
||||
printf("glGetError = 0x%x\n", (int) glGetError());
|
||||
printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
|
||||
(char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
|
||||
|
||||
glEnable(GL_TEXTURE_2D);
|
||||
|
||||
/* Load "pallete" as a 1D BGRA8888 texture */
|
||||
glActiveTextureARB(GL_TEXTURE1_ARB);
|
||||
glGenTextures(1, &Texture);
|
||||
glBindTexture(GL_TEXTURE_1D, Texture);
|
||||
|
||||
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
||||
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
||||
|
||||
glTexImage1D(GL_TEXTURE_1D, /* target */
|
||||
0, /* level */
|
||||
GL_RGBA, /* internal format */
|
||||
256, /* width */
|
||||
0, /* border */
|
||||
GL_BGRA, /* texture format */
|
||||
GL_UNSIGNED_BYTE, /* texture type */
|
||||
table); /* the texture */
|
||||
|
||||
glEnable(GL_TEXTURE_1D);
|
||||
|
||||
/* glEnable(GL_BLEND); */
|
||||
/* glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); */
|
||||
#undef HEIGHT
|
||||
#undef WIDTH
|
||||
}
|
||||
|
||||
|
||||
glClearColor(.3, .3, .3, 0);
|
||||
}
|
||||
|
||||
static void Reshape(int width, int height)
|
||||
{
|
||||
|
||||
glViewport(0, 0, (GLint)width, (GLint)height);
|
||||
|
||||
glMatrixMode(GL_PROJECTION);
|
||||
glLoadIdentity();
|
||||
glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
|
||||
glMatrixMode(GL_MODELVIEW);
|
||||
}
|
||||
|
||||
static void Key(unsigned char key, int x, int y)
|
||||
{
|
||||
|
||||
switch (key) {
|
||||
case 27:
|
||||
exit(1);
|
||||
default:
|
||||
return;
|
||||
}
|
||||
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
static void Draw(void)
|
||||
{
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
glBegin(GL_QUADS);
|
||||
glTexCoord2f(1,1);
|
||||
glVertex3f( 0.9, -0.9, -30.0);
|
||||
glTexCoord2f(1,0);
|
||||
glVertex3f( 0.9, 0.9, -30.0);
|
||||
glTexCoord2f(0,0);
|
||||
glVertex3f(-0.9, 0.9, -30.0);
|
||||
glTexCoord2f(0,1);
|
||||
glVertex3f(-0.9, -0.9, -30.0);
|
||||
glEnd();
|
||||
|
||||
glFlush();
|
||||
|
||||
if (doubleBuffer) {
|
||||
glutSwapBuffers();
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
static GLenum Args(int argc, char **argv)
|
||||
{
|
||||
GLint i;
|
||||
|
||||
doubleBuffer = GL_FALSE;
|
||||
|
||||
for (i = 1; i < argc; i++) {
|
||||
if (strcmp(argv[i], "-sb") == 0) {
|
||||
doubleBuffer = GL_FALSE;
|
||||
} else if (strcmp(argv[i], "-db") == 0) {
|
||||
doubleBuffer = GL_TRUE;
|
||||
} else {
|
||||
fprintf(stderr, "%s (Bad option).\n", argv[i]);
|
||||
return GL_FALSE;
|
||||
}
|
||||
}
|
||||
return GL_TRUE;
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
GLenum type;
|
||||
|
||||
glutInit(&argc, argv);
|
||||
|
||||
if (Args(argc, argv) == GL_FALSE) {
|
||||
exit(1);
|
||||
}
|
||||
|
||||
glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
|
||||
|
||||
type = GLUT_RGB;
|
||||
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
|
||||
glutInitDisplayMode(type);
|
||||
|
||||
if (glutCreateWindow("First Tri") == GL_FALSE) {
|
||||
exit(1);
|
||||
}
|
||||
|
||||
Init();
|
||||
|
||||
glutReshapeFunc(Reshape);
|
||||
glutKeyboardFunc(Key);
|
||||
glutDisplayFunc(Draw);
|
||||
glutMainLoop();
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue