From 46bc595969e23ea1a61b684076f8b0608ff4d714 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 12 May 2004 23:05:21 +0000 Subject: [PATCH] Test program to check that packed pixel formats work as expected with glTexImage2D. All samples should appear identical. Press f/F to change the internal texture format. --- progs/tests/Makefile | 1 + progs/tests/packedpixels.c | 299 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 300 insertions(+) create mode 100644 progs/tests/packedpixels.c diff --git a/progs/tests/Makefile b/progs/tests/Makefile index f224934..52b6b1e 100644 --- a/progs/tests/Makefile +++ b/progs/tests/Makefile @@ -31,6 +31,7 @@ SOURCES = antialias.c \ getprocaddress.c \ manytex.c \ multipal.c \ + packedpixels.c \ pbo.c \ projtex.c \ seccolor.c \ diff --git a/progs/tests/packedpixels.c b/progs/tests/packedpixels.c new file mode 100644 index 0000000..842cf7f --- /dev/null +++ b/progs/tests/packedpixels.c @@ -0,0 +1,299 @@ +/* + * Test packed pixel formats for textures. + * Brian Paul + * 12 May 2004 + */ + +#include +#include +#include +#include +#include + + +struct pixel_format { + const char *name; + GLenum format; + GLenum type; + GLint bytes; + GLuint redTexel, greenTexel; +}; + +static const struct pixel_format Formats[] = { + + { "GL_RGBA/GL_UNSIGNED_INT_8_8_8_8", + GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, 4, 0xff000000, 0x00ff0000 }, + { "GL_RGBA/GL_UNSIGNED_INT_8_8_8_8_REV", + GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, 4, 0x000000ff, 0x0000ff00 }, + { "GL_RGBA/GL_UNSIGNED_INT_10_10_10_2", + GL_RGBA, GL_UNSIGNED_INT_10_10_10_2, 4, 0xffc00000, 0x3ff000 }, + { "GL_RGBA/GL_UNSIGNED_INT_2_10_10_10_REV", + GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, 4, 0x3ff, 0xffc00 }, + { "GL_RGBA/GL_UNSIGNED_SHORT_4_4_4_4", + GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, 2, 0xf000, 0x0f00 }, + { "GL_RGBA/GL_UNSIGNED_SHORT_4_4_4_4_REV", + GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4_REV, 2, 0x000f, 0x00f0 }, + { "GL_RGBA/GL_UNSIGNED_SHORT_5_5_5_1", + GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, 2, 0xf800, 0x7c0 }, + { "GL_RGBA/GL_UNSIGNED_SHORT_1_5_5_5_REV", + GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, 2, 0x1f, 0x3e0 }, + + { "GL_BGRA/GL_UNSIGNED_INT_8_8_8_8", + GL_BGRA, GL_UNSIGNED_INT_8_8_8_8, 4, 0x0000ff00, 0x00ff0000 }, + { "GL_BGRA/GL_UNSIGNED_INT_8_8_8_8_REV", + GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, 4, 0x00ff0000, 0x0000ff00 }, + { "GL_BGRA/GL_UNSIGNED_SHORT_4_4_4_4", + GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4, 2, 0x00f0, 0x0f00 }, + { "GL_BGRA/GL_UNSIGNED_SHORT_4_4_4_4_REV", + GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV, 2, 0x0f00, 0x00f0 }, + { "GL_BGRA/GL_UNSIGNED_SHORT_5_5_5_1", + GL_BGRA, GL_UNSIGNED_SHORT_5_5_5_1, 2, 0x3e, 0x7c0 }, + { "GL_BGRA/GL_UNSIGNED_SHORT_1_5_5_5_REV", + GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV, 2, 0x7c00, 0x3e0 }, + + { "GL_ABGR_EXT/GL_UNSIGNED_INT_8_8_8_8", + GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8, 4, 0x000000ff, 0x0000ff00 }, + { "GL_ABGR_EXT/GL_UNSIGNED_INT_8_8_8_8_REV", + GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV, 4, 0xff000000, 0x00ff0000 }, + { "GL_ABGR_EXT/GL_UNSIGNED_SHORT_4_4_4_4", + GL_ABGR_EXT, GL_UNSIGNED_SHORT_4_4_4_4, 2, 0x000f, 0x00f0 }, + { "GL_ABGR_EXT/GL_UNSIGNED_SHORT_4_4_4_4_REV", + GL_ABGR_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV, 2, 0xf000, 0x0f00 }, + { "GL_ABGR_EXT/GL_UNSIGNED_SHORT_5_5_5_1", + GL_ABGR_EXT, GL_UNSIGNED_SHORT_5_5_5_1, 2, 0x1, 0x3e }, + { "GL_ABGR_EXT/GL_UNSIGNED_SHORT_1_5_5_5_REV", + GL_ABGR_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV, 2, 0x8000, 0x7c00 }, + + { "GL_RGB/GL_UNSIGNED_SHORT_5_6_5", + GL_RGB, GL_UNSIGNED_SHORT_5_6_5, 2, 0xf800, 0x7e0 }, + { "GL_RGB/GL_UNSIGNED_SHORT_5_6_5_REV", + GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV, 2, 0x1f, 0x7e0 }, + { "GL_RGB/GL_UNSIGNED_BYTE_3_3_2", + GL_RGB, GL_UNSIGNED_BYTE_3_3_2, 1, 0xe0, 0x1c }, + { "GL_RGB/GL_UNSIGNED_BYTE_2_3_3_REV", + GL_RGB, GL_UNSIGNED_BYTE_2_3_3_REV, 1, 0x7, 0x38 }, + + { NULL, 0, 0, 0, 0, 0 } +}; + + +struct name_format { + const char *name; + GLenum format; +}; + +static const struct name_format IntFormats[] = { + { "GL_RGBA", GL_RGBA }, + { "GL_RGBA2", GL_RGBA2 }, + { "GL_RGBA4", GL_RGBA4 }, + { "GL_RGB5_A1", GL_RGB5_A1 }, + { "GL_RGBA8", GL_RGBA8 }, + { "GL_RGBA12", GL_RGBA12 }, + { "GL_RGBA16", GL_RGBA16 }, + { "GL_RGB10_A2", GL_RGB10_A2 }, + + { "GL_RGB", GL_RGB }, + { "GL_R3_G3_B2", GL_R3_G3_B2 }, + { "GL_RGB4", GL_RGB4 }, + { "GL_RGB5", GL_RGB5 }, + { "GL_RGB8", GL_RGB8 }, + { "GL_RGB10", GL_RGB10 }, + { "GL_RGB12", GL_RGB12 }, + { "GL_RGB16", GL_RGB16 }, + +}; + +#define NUM_INT_FORMATS (sizeof(IntFormats) / sizeof(IntFormats[0])) +static GLuint CurFormat = 0; + + +static void +PrintString(const char *s) +{ + while (*s) { + glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s); + s++; + } +} + + +static void +MakeTexture(const struct pixel_format *format, GLenum intFormat, GLboolean swap) +{ + GLubyte texBuffer[1000]; + int i; + + glPixelStorei(GL_UNPACK_SWAP_BYTES, swap); + + if (format->bytes == 1) { + for (i = 0; i < 8; i++) { + texBuffer[i] = format->redTexel; + } + for (i = 8; i < 16; i++) { + texBuffer[i] = format->greenTexel; + } + } + else if (format->bytes == 2) { + GLushort *us = (GLushort *) texBuffer; + for (i = 0; i < 8; i++) { + us[i] = format->redTexel; + } + for (i = 8; i < 16; i++) { + us[i] = format->greenTexel; + } + if (swap) { + for (i = 0; i < 16; i++) + us[i] = (us[i] << 8) | (us[i] >> 8); + } + } + else if (format->bytes == 4) { + GLuint *ui = (GLuint *) texBuffer; + for (i = 0; i < 8; i++) { + ui[i] = format->redTexel; + } + for (i = 8; i < 16; i++) { + ui[i] = format->greenTexel; + } + if (swap) { + for (i = 0; i < 16; i++) { + GLuint b = ui[i]; + ui[i] = (b >> 24) + | ((b >> 8) & 0xff00) + | ((b << 8) & 0xff0000) + | ((b << 24) & 0xff000000); + } + } + } + else { + abort(); + } + glTexImage2D(GL_TEXTURE_2D, 0, intFormat, 4, 4, 0, + format->format, format->type, texBuffer); + + if (glGetError()) { + printf("GL Error for %s\n", format->name); + memset(texBuffer, 255, 1000); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 4, 4, 0, + GL_RGB, GL_UNSIGNED_BYTE, texBuffer); + } +} + + + +static void +Draw(void) +{ + char s[1000]; + int w = 350, h = 20; + int i, swap; + + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + for (swap = 0; swap < 2; swap++) { + for (i = 0; Formats[i].name; i++) { + glPushMatrix(); + glTranslatef(swap * (w + 2), i * (h + 2), 0); + + MakeTexture(Formats + i, IntFormats[CurFormat].format, swap); + + glEnable(GL_TEXTURE_2D); + glBegin(GL_POLYGON); + glTexCoord2f(0, 0); glVertex2f(0, 0); + glTexCoord2f(1, 0); glVertex2f(w, 0); + glTexCoord2f(1, 1); glVertex2f(w, h); + glTexCoord2f(0, 1); glVertex2f(0, h); + glEnd(); + + glDisable(GL_TEXTURE_2D); + glColor3f(0, 0, 0); + glRasterPos2i(8, 6); + PrintString(Formats[i].name); + + glPopMatrix(); + } + } + + glPushMatrix(); + glTranslatef(2, i * (h + 2), 0); + glColor3f(1, 1, 1); + glRasterPos2i(8, 6); + PrintString("Normal"); + glRasterPos2i(w + 2, 6); + PrintString("Byte Swapped"); + glPopMatrix(); + + glPushMatrix(); + glTranslatef(2, (i + 1) * (h + 2), 0); + glRasterPos2i(8, 6); + sprintf(s, "Internal Texture Format [f/F]: %s (%d of %d)", + IntFormats[CurFormat].name, CurFormat + 1, NUM_INT_FORMATS); + PrintString(s); + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void +Reshape(int width, int height) +{ + glViewport(0, 0, width, height); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(0, width, 0, height, -1, 1); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); +} + + +static void +Key(unsigned char key, int x, int y) +{ + (void) x; + (void) y; + switch (key) { + case 'F': + if (CurFormat == 0) + CurFormat = NUM_INT_FORMATS - 1; + else + CurFormat--; + break; + case 'f': + CurFormat++; + if (CurFormat == NUM_INT_FORMATS) + CurFormat = 0; + break; + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void +Init(void) +{ + printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); + printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); +} + + +int +main(int argc, char *argv[]) +{ + glutInit(&argc, argv); + glutInitWindowPosition(0, 0); + glutInitWindowSize(700, 800); + glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); + glutCreateWindow(argv[0]); + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutDisplayFunc(Draw); + Init(); + glutMainLoop(); + return 0; +} -- 2.7.4