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progs/es1: Add compressed paletted texture tests to torus.

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The tests can be toggled by `t'.  It will print current texture format
and the size of the image.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
This commit is contained in:
Chia-I Wu
2009-11-24 14:34:17 +08:00
committed by Brian Paul
parent a316b700ef
commit 8e6774937f
1 changed files with 149 additions and 2 deletions
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progs/es1/xegl/torus.c
+149 -2
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@@ -22,9 +22,27 @@
#include <EGL/egl.h>
static const struct {
GLenum internalFormat;
const char *name;
GLuint num_entries;
GLuint size;
} cpal_formats[] = {
{ GL_PALETTE4_RGB8_OES, "GL_PALETTE4_RGB8_OES", 16, 3 },
{ GL_PALETTE4_RGBA8_OES, "GL_PALETTE4_RGBA8_OES", 16, 4 },
{ GL_PALETTE4_R5_G6_B5_OES, "GL_PALETTE4_R5_G6_B5_OES", 16, 2 },
{ GL_PALETTE4_RGBA4_OES, "GL_PALETTE4_RGBA4_OES", 16, 2 },
{ GL_PALETTE4_RGB5_A1_OES, "GL_PALETTE4_RGB5_A1_OES", 16, 2 },
{ GL_PALETTE8_RGB8_OES, "GL_PALETTE8_RGB8_OES", 256, 3 },
{ GL_PALETTE8_RGBA8_OES, "GL_PALETTE8_RGBA8_OES", 256, 4 },
{ GL_PALETTE8_R5_G6_B5_OES, "GL_PALETTE8_R5_G6_B5_OES", 256, 2 },
{ GL_PALETTE8_RGBA4_OES, "GL_PALETTE8_RGBA4_OES", 256, 2 },
{ GL_PALETTE8_RGB5_A1_OES, "GL_PALETTE8_RGB5_A1_OES", 256, 2 }
};
#define NUM_CPAL_FORMATS (sizeof(cpal_formats) / sizeof(cpal_formats[0]))
static GLfloat view_rotx = 0.0, view_roty = 0.0, view_rotz = 0.0;
static GLint tex_format = NUM_CPAL_FORMATS;
static void
@@ -163,7 +181,121 @@ reshape(int width, int height)
}
static void
static GLint
make_cpal_texture(GLint idx)
{
#define SZ 64
GLenum internalFormat = GL_PALETTE4_RGB8_OES + idx;
GLenum Filter = GL_LINEAR;
GLubyte palette[256 * 4 + SZ * SZ];
GLubyte *indices;
GLsizei image_size;
GLuint i, j;
GLuint packed_indices = 0;
assert(cpal_formats[idx].internalFormat == internalFormat);
/* init palette */
switch (internalFormat) {
case GL_PALETTE4_RGB8_OES:
case GL_PALETTE8_RGB8_OES:
/* first entry */
palette[0] = 255;
palette[1] = 255;
palette[2] = 255;
/* second entry */
palette[3] = 127;
palette[4] = 127;
palette[5] = 127;
break;
case GL_PALETTE4_RGBA8_OES:
case GL_PALETTE8_RGBA8_OES:
/* first entry */
palette[0] = 255;
palette[1] = 255;
palette[2] = 255;
palette[3] = 255;
/* second entry */
palette[4] = 127;
palette[5] = 127;
palette[6] = 127;
palette[7] = 255;
break;
case GL_PALETTE4_R5_G6_B5_OES:
case GL_PALETTE8_R5_G6_B5_OES:
{
GLushort *pal = (GLushort *) palette;
/* first entry */
pal[0] = (31 << 11 | 63 << 5 | 31);
/* second entry */
pal[1] = (15 << 11 | 31 << 5 | 15);
}
break;
case GL_PALETTE4_RGBA4_OES:
case GL_PALETTE8_RGBA4_OES:
{
GLushort *pal = (GLushort *) palette;
/* first entry */
pal[0] = (15 << 12 | 15 << 8 | 15 << 4 | 15);
/* second entry */
pal[1] = (7 << 12 | 7 << 8 | 7 << 4 | 15);
}
break;
case GL_PALETTE4_RGB5_A1_OES:
case GL_PALETTE8_RGB5_A1_OES:
{
GLushort *pal = (GLushort *) palette;
/* first entry */
pal[0] = (31 << 11 | 31 << 6 | 31 << 1 | 1);
/* second entry */
pal[1] = (15 << 11 | 15 << 6 | 15 << 1 | 1);
}
break;
}
image_size = cpal_formats[idx].size * cpal_formats[idx].num_entries;
indices = palette + image_size;
for (i = 0; i < SZ; i++) {
for (j = 0; j < SZ; j++) {
GLfloat d;
GLint index;
d = (i - SZ/2) * (i - SZ/2) + (j - SZ/2) * (j - SZ/2);
d = sqrt(d);
index = (d < SZ / 3) ? 0 : 1;
if (cpal_formats[idx].num_entries == 16) {
/* 4-bit indices packed in GLubyte */
packed_indices |= index << (4 * (1 - (j % 2)));
if (j % 2) {
*(indices + (i * SZ + j - 1) / 2) = packed_indices & 0xff;
packed_indices = 0;
image_size += 1;
}
}
else {
/* 8-bit indices */
*(indices + i * SZ + j) = index;
image_size += 1;
}
}
}
glActiveTexture(GL_TEXTURE0); /* unit 0 */
glBindTexture(GL_TEXTURE_2D, 42);
glCompressedTexImage2D(GL_TEXTURE_2D, 0, internalFormat, SZ, SZ, 0,
image_size, palette);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, Filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, Filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
#undef SZ
return image_size;
}
static GLint
make_texture(void)
{
#define SZ 64
@@ -199,6 +331,8 @@ make_texture(void)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
#undef SZ
return sizeof(image);
}
@@ -369,6 +503,19 @@ event_loop(Display *dpy, Window win,
else if (code == XK_Down) {
view_rotx -= 5.0;
}
else if (code == XK_t) {
GLint size;
tex_format = (tex_format + 1) % (NUM_CPAL_FORMATS + 1);
if (tex_format < NUM_CPAL_FORMATS) {
size = make_cpal_texture(tex_format);
printf("Using %s (%d bytes)\n",
cpal_formats[tex_format].name, size);
}
else {
size = make_texture();
printf("Using uncompressed texture (%d bytes)\n", size);
}
}
else {
r = XLookupString(&event.xkey, buffer, sizeof(buffer),
NULL, NULL);