A) DXE3 refers to the DJGPP dynamic modules. You'll need either the latest
DJGPP distro, or download the separate package from my web page. Read the
DXE3 documentation on how to use them.
- A) When compiling for Glide (FX=1), make sure `glid3.dxe' can be found in
+ A) When compiling for Glide (FX=1), make sure `glide3x.dxe' can be found in
LD_LIBRARY_PATH (or top `lib' directory).
2. Using Mesa for DJGPP
know, because all messages come in bulk, but I think it's better than nothing.
"Borrowed" from LIBRHUTI (Robert Hoehne).
-Window creating defaults: 300x300x16 at (0,0), 16-bit depth, 16-bit accum,
-8-bit stencil. However, the video mode is chosen in such a way that first
-window will fit. If you need high resolution with small windows, set initial
-position far to the right (or way down); then you can move them back to any
-position right before the main loop.
+Window creating defaults: (0, 0, 300, 300), 16bpp. However, the video mode is
+chosen in such a way that first window will fit. If you need high resolution
+with small windows, set initial position far to the right (or way down); then
+you can move them back to any position right before the main loop.
The following environment variables can customize GLUT behaviour:
GLUT_FPS - print frames/second statistics to stderr
DMESA_GLUT_REFRESH - set vertical screen refresh rate (VESA3)
DMESA_GLUT_BPP - set default bits per pixel (VGA needs 8)
- DMESA_GLUT_DEPTH - set default depth bits
- DMESA_GLUT_STENCIL - set default stencil bits
- DMESA_GLUT_ACCUM - set default accum bits
+ DMESA_GLUT_ALPHA - set default alpha bits (8)
+ DMESA_GLUT_DEPTH - set default depth bits (16)
+ DMESA_GLUT_STENCIL - set default stencil bits (8)
+ DMESA_GLUT_ACCUM - set default accum bits (16)
v1.4 (aug-2003)
+ enabled GLUT fonts with DXE
- + truly added multi-window support in GLUT
+ + truly added multi-window support in GLUT (for Adrian Woodward)
* accomodated makefiles with the new sourcetree
- * hacked and slashed the 3dfx driver (w/ help from Hiroshi Morii)
+ * fixed some ALPHA issues
+ x hacked and slashed the 3dfx driver (w/ help from Hiroshi Morii)
GLint refresh, /* refresh rate: 0=default */
GLboolean dbFlag, /* double-buffered */
GLboolean rgbFlag, /* RGB mode */
- GLboolean alphaFlag,/* alpha buffer requested */
+ GLint alphaSize, /* requested bits/alpha */
GLint depthSize, /* requested bits/depth */
GLint stencilSize, /* requested bits/stencil */
GLint accumSize); /* requested bits/accum */
LDLIBS = -lglut -lglu -lgl
ifeq ($(FX),1)
LDFLAGS += -L$(GLIDE)/lib
-LDLIBS += -lglid3
+LDLIBS += -lgld3x
endif
endif
extern GLUTmenuStatusCB g_menu_status_func;
extern GLuint g_bpp; /* HW: bits per pixel */
+extern GLuint g_alpha; /* HW: alpha bits */
extern GLuint g_depth; /* HW: depth bits */
extern GLuint g_stencil; /* HW: stencil bits */
extern GLuint g_accum; /* HW: accum bits */
#define DEFAULT_HEIGHT 300
#define DEFAULT_BPP 16
+#define ALPHA_SIZE 8
#define DEPTH_SIZE 16
#define STENCIL_SIZE 8
#define ACCUM_SIZE 16
GLuint g_bpp = DEFAULT_BPP;
+GLuint g_alpha = ALPHA_SIZE;
GLuint g_depth = DEPTH_SIZE;
GLuint g_stencil = STENCIL_SIZE;
GLuint g_accum = ACCUM_SIZE;
if ((env = getenv("DMESA_GLUT_BPP")) != NULL) {
g_bpp = atoi(env);
}
+ if ((env = getenv("DMESA_GLUT_ALPHA")) != NULL) {
+ g_alpha = atoi(env);
+ }
if ((env = getenv("DMESA_GLUT_DEPTH")) != NULL) {
g_depth = atoi(env);
}
if ((visual=DMesaCreateVisual(g_init_x + m8width, g_init_y + g_init_h, g_bpp, g_refresh,
g_display_mode & GLUT_DOUBLE,
!(g_display_mode & GLUT_INDEX),
- g_display_mode & GLUT_ALPHA,
- g_display_mode & GLUT_DEPTH ? g_depth :0,
- g_display_mode & GLUT_STENCIL ? g_stencil:0,
- g_display_mode & GLUT_ACCUM ? g_accum :0))==NULL) {
+ (g_display_mode & GLUT_ALPHA ) ? g_alpha : 0,
+ (g_display_mode & GLUT_DEPTH ) ? g_depth : 0,
+ (g_display_mode & GLUT_STENCIL) ? g_stencil : 0,
+ (g_display_mode & GLUT_ACCUM ) ? g_accum : 0))==NULL) {
return 0;
}
ifeq ($(FX),1)
CFLAGS += -D__DOS__ -DH3
CFLAGS += -I$(GLIDE)/include -DFX
-LIBNAME = "MesaGL/FX DJGPP"
+LIBNAME = "Mesa/FX DJGPP"
else
ifeq ($(MATROX),1)
CFLAGS += -DMATROX
-LIBNAME = "MesaGL/MGA DJGPP"
+LIBNAME = "Mesa/MGA DJGPP"
else
-LIBNAME = "MesaGL DJGPP"
+LIBNAME = "Mesa DJGPP"
endif
endif
GLvisual gl_visual;
GLboolean db_flag; /* double buffered? */
GLboolean rgb_flag; /* RGB mode? */
+ GLboolean sw_alpha; /* use Mesa's alpha buffer? */
GLuint depth; /* bits per pixel (1, 8, 24, etc) */
#ifdef MATROX
int stride_in_pixels;
GLint refresh,
GLboolean dbFlag,
GLboolean rgbFlag,
- GLboolean alphaFlag,
+ GLint alphaSize,
GLint depthSize,
GLint stencilSize,
GLint accumSize)
#ifndef FX
DMesaVisual v;
GLint redBits, greenBits, blueBits, alphaBits, indexBits;
+ GLboolean sw_alpha;
#ifndef MATROX
if (!dbFlag) {
blueBits = 8;
break;
case 15:
+ alphaBits = 1;
redBits = 5;
greenBits = 5;
blueBits = 5;
}
}
+ /* Okay,
+ * `alphaBits' is what we can provide
+ * `alphaSize' is what app requests
+ *
+ * Note that alpha buffering is required only if destination alpha is used
+ * in alpha blending; alpha blending modes that do not use destination alpha
+ * can be used w/o alpha buffer.
+ *
+ * We will use whatever ALPHA app requests. Later, in `CreateBuffer' we'll
+ * instruct Mesa to use its own ALPHA buffer, by passing a non-FALSE value
+ * for ALPHA to `_mesa_initialize_framebuffer'.
+ *
+ * Basically, 32bit modes provide ALPHA storage, but can we rely on this?
+ */
+ alphaBits = alphaSize;
+ sw_alpha = (alphaBits > 0);
+
#ifndef MATROX
if ((colDepth=vl_video_init(width, height, colDepth, rgbFlag, refresh)) <= 0) {
return NULL;
}
#endif
- if (alphaFlag && (alphaBits==0)) {
- alphaBits = 8;
- }
-
if ((v=(DMesaVisual)CALLOC_STRUCT(dmesa_visual)) != NULL) {
/* Create core visual */
_mesa_initialize_visual((GLvisual *)v,
accumSize, /* accumRed */
accumSize, /* accumGreen */
accumSize, /* accumBlue */
- alphaFlag?accumSize:0, /* accumAlpha */
+ alphaBits?accumSize:0, /* accumAlpha */
1); /* numSamples */
v->depth = colDepth;
v->db_flag = dbFlag;
v->rgb_flag = rgbFlag;
+ v->sw_alpha = sw_alpha;
v->zbuffer = (depthSize > 0) ? 1 : 0;
#ifdef MATROX
if (depthSize > 0) { fx_attrib[i++] = FXMESA_DEPTH_SIZE; fx_attrib[i++] = depthSize; }
if (stencilSize > 0) { fx_attrib[i++] = FXMESA_STENCIL_SIZE; fx_attrib[i++] = stencilSize; }
if (accumSize > 0) { fx_attrib[i++] = FXMESA_ACCUM_SIZE; fx_attrib[i++] = accumSize; }
- if (alphaFlag) { fx_attrib[i++] = FXMESA_ALPHA_SIZE; fx_attrib[i++] = 1; }
+ if (alphaSize) { fx_attrib[i++] = FXMESA_ALPHA_SIZE; fx_attrib[i++] = alphaSize; }
fx_attrib[i++] = FXMESA_COLORDEPTH;
fx_attrib[i++] = colDepth;
fx_attrib[i] = FXMESA_NONE;
visual->zbuffer == 1,
((GLvisual *)visual)->stencilBits > 0,
((GLvisual *)visual)->accumRedBits > 0,
- ((GLvisual *)visual)->alphaBits > 0);
+ visual->sw_alpha);
b->xpos = xpos;
b->ypos = ypos;
b->width = width;
*/
/*
- * DOS/DJGPP device driver v1.3 for Mesa
+ * DOS/DJGPP device driver v1.4 for Mesa
*
* Copyright (C) 2002 - Borca Daniel
- * Email : dborca@yahoo.com
+ * Email : dborca@users.sourceforge.net
* Web : http://www.geocities.com/dborca
*
* Thanks to CrazyPyro (Neil Funk) for FakeColor
#define vl_mixrgba24 vl_mixrgb24
static int vl_mixrgba32 (const unsigned char rgba[])
{
- return (rgba[3]<<24)|(rgba[0]<<16)|(rgba[1]<<8)|(rgba[2]);
+ /* Hack alert:
+ * currently, DMesa uses Mesa's alpha buffer;
+ * so we don't really care about alpha value here...
+ */
+ return /*(rgba[3]<<24)|*/(rgba[0]<<16)|(rgba[1]<<8)|(rgba[2]);
}
*
* Note: -
*/
-static int vl_mixrgb8fake (const unsigned char rgba[])
+static int vl_mixrgb8fake (const unsigned char rgb[])
{
- return array_b[rgba[2]]*G_CNT*R_CNT
- + array_g[rgba[1]]*R_CNT
- + array_r[rgba[0]];
+ return array_b[rgb[2]]*G_CNT*R_CNT
+ + array_g[rgb[1]]*R_CNT
+ + array_r[rgb[0]];
}
#define vl_mixrgb8 vl_mixrgb8fake
static int vl_mixrgb15 (const unsigned char rgb[])
*
* Note: uses current read buffer
*/
-static void v_getrgba8fake6 (unsigned int offset, unsigned char rgba[])
+static void v_getrgba8fake6 (unsigned int offset, unsigned char rgba[4])
{
word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
rgba[0] = _rgb_scale_6[(c >> 16) & 0x3F];
rgba[1] = _rgb_scale_6[(c >> 8) & 0x3F];
rgba[2] = _rgb_scale_6[c & 0x3F];
- rgba[3] = c >> 24;
+ /*rgba[3] = c >> 24;*/ /* dummy alpha; we have separate SW alpha, so ignore */
}
-static void v_getrgba8fake8 (unsigned int offset, unsigned char rgba[])
+static void v_getrgba8fake8 (unsigned int offset, unsigned char rgba[4])
{
word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
rgba[0] = c >> 16;
rgba[1] = c >> 8;
rgba[2] = c;
- rgba[3] = c >> 24;
+ /*rgba[3] = c >> 24;*/ /* dummy alpha; we have separate SW alpha, so ignore */
}
#define v_getrgba8 v_getrgba8fake6
static void v_getrgba15 (unsigned int offset, unsigned char rgba[4])
rgba[1] = _rgb_scale_5[(c >> 5) & 0x1F];
rgba[2] = _rgb_scale_5[c & 0x1F];
#endif
- rgba[3] = 255;
+ /*rgba[3] = 255;*/ /* dummy alpha; we have separate SW alpha, so ignore */
}
static void v_getrgba16 (unsigned int offset, unsigned char rgba[4])
{
rgba[1] = _rgb_scale_6[(c >> 5) & 0x3F];
rgba[2] = _rgb_scale_5[c & 0x1F];
#endif
- rgba[3] = 255;
+ /*rgba[3] = 255;*/ /* dummy alpha; we have separate SW alpha, so ignore */
}
static void v_getrgba24 (unsigned int offset, unsigned char rgba[4])
{
rgba[0] = c >> 16;
rgba[1] = c >> 8;
rgba[2] = c;
- rgba[3] = 255;
+ /*rgba[3] = 255;*/ /* dummy alpha; we have separate SW alpha, so ignore */
}
static void v_getrgba32 (unsigned int offset, unsigned char rgba[4])
{
rgba[0] = c >> 16;
rgba[1] = c >> 8;
rgba[2] = c;
- rgba[3] = c >> 24;
+ /*rgba[3] = c >> 24;*/ /* dummy alpha; we have separate SW alpha, so ignore */
}
projects / mesa.git / commitdiff