added NUL driver for DMesa

4 files changed, 325 insertions, 51 deletions

diff --git a/src/mesa/drivers/dos/dmesa.c b/src/mesa/drivers/dos/dmesa.c
index c8fd91864bd..e0744a88de8 100644
--- a/src/mesa/drivers/dos/dmesa.c
+++ b/src/mesa/drivers/dos/dmesa.c
@@ -69,11 +69,8 @@
  */
 struct dmesa_visual {
    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) */
-   int zbuffer;                 /* Z=buffer: 0=no, 1=SW, -1=HW */
+   int z_buffer;                /* Z=buffer: 0=no, 1=SW, -1=HW */
 };
 
 /*
@@ -95,7 +92,7 @@ struct dmesa_buffer {
 struct dmesa_context {
    GLcontext gl_ctx;            /* the core library context */
    DMesaVisual visual;
-   DMesaBuffer Buffer;
+   DMesaBuffer buffer;
    GLuint ClearColor;
    GLuint ClearIndex;
    /* etc... */
@@ -107,10 +104,10 @@ struct dmesa_context {
 /****************************************************************************
  * Read/Write pixels
  ***************************************************************************/
-#define FLIP(y)  (dmesa->Buffer->height - (y) - 1)
+#define FLIP(y)  (dmesa->buffer->height - (y) - 1)
 #define FLIP2(y) (_b_ - (y))
 
-#define DSTRIDE dmesa->Buffer->width
+#define DSTRIDE dmesa->buffer->width
 
 /****************************************************************************
  * RGB[A]
@@ -208,7 +205,7 @@ static void write_rgba_pixels (const GLcontext *ctx,
                                const GLubyte rgba[][4], const GLubyte mask[])
 {
  const DMesaContext dmesa = (DMesaContext)ctx;
- GLuint i, _w_ = DSTRIDE, _b_ = dmesa->Buffer->height - 1;
+ GLuint i, _w_ = DSTRIDE, _b_ = dmesa->buffer->height - 1;
 
  if (mask) {
     /* draw some pixels */
@@ -232,7 +229,7 @@ static void write_mono_rgba_pixels (const GLcontext *ctx,
                                     const GLchan color[4], const GLubyte mask[])
 {
  const DMesaContext dmesa = (DMesaContext)ctx;
- GLuint i, _w_ = DSTRIDE, _b_ = dmesa->Buffer->height - 1, rgba = vl_mixrgba(color);
+ GLuint i, _w_ = DSTRIDE, _b_ = dmesa->buffer->height - 1, rgba = vl_mixrgba(color);
 
  if (mask) {
     /* draw some pixels */
@@ -256,7 +253,7 @@ static void read_rgba_pixels (const GLcontext *ctx,
                               GLubyte rgba[][4], const GLubyte mask[])
 {
  const DMesaContext dmesa = (DMesaContext)ctx;
- GLuint i, _w_ = DSTRIDE, _b_ = dmesa->Buffer->height - 1;
+ GLuint i, _w_ = DSTRIDE, _b_ = dmesa->buffer->height - 1;
 
  if (mask) {
     /* read some pixels */
@@ -371,7 +368,7 @@ static void write_index_pixels (const GLcontext *ctx,
                                 const GLuint index[], const GLubyte mask[])
 {
  const DMesaContext dmesa = (DMesaContext)ctx;
- GLuint i, _w_ = DSTRIDE, _b_ = dmesa->Buffer->height - 1;
+ GLuint i, _w_ = DSTRIDE, _b_ = dmesa->buffer->height - 1;
 
  if (mask) {
     /* draw some pixels */
@@ -395,7 +392,7 @@ static void write_mono_index_pixels (const GLcontext *ctx,
                                      GLuint colorIndex, const GLubyte mask[])
 {
  const DMesaContext dmesa = (DMesaContext)ctx;
- GLuint i, _w_ = DSTRIDE, _b_ = dmesa->Buffer->height - 1;
+ GLuint i, _w_ = DSTRIDE, _b_ = dmesa->buffer->height - 1;
 
  if (mask) {
     /* draw some pixels */
@@ -419,7 +416,7 @@ static void read_index_pixels (const GLcontext *ctx,
                                GLuint index[], const GLubyte mask[])
 {
  const DMesaContext dmesa = (DMesaContext)ctx;
- GLuint i, _w_ = DSTRIDE, _b_ = dmesa->Buffer->height - 1;
+ GLuint i, _w_ = DSTRIDE, _b_ = dmesa->buffer->height - 1;
 
  if (mask) {
     /* read some pixels */
@@ -455,8 +452,8 @@ static void read_index_pixels (const GLcontext *ctx,
 
 #define SETUP_CODE \
  const DMesaContext dmesa = (DMesaContext)ctx; \
- GLuint _b_ = dmesa->Buffer->height - 1; \
- GLuint _w_ = dmesa->Buffer->width; \
+ GLuint _b_ = dmesa->buffer->height - 1; \
+ GLuint _w_ = dmesa->buffer->width; \
  GLuint rgb = vl_mixrgb(v2->color);
 
 #define RENDER_SPAN(span) \
@@ -479,8 +476,8 @@ static void read_index_pixels (const GLcontext *ctx,
 
 #define SETUP_CODE \
  const DMesaContext dmesa = (DMesaContext)ctx; \
- GLuint _b_ = dmesa->Buffer->height - 1; \
- GLuint _w_ = dmesa->Buffer->width; \
+ GLuint _b_ = dmesa->buffer->height - 1; \
+ GLuint _w_ = dmesa->buffer->width; \
  GLuint rgb = vl_mixrgb(v2->color);
 
 #define RENDER_SPAN(span) \
@@ -507,8 +504,8 @@ static void read_index_pixels (const GLcontext *ctx,
 
 #define SETUP_CODE \
  const DMesaContext dmesa = (DMesaContext)ctx; \
- GLuint _b_ = dmesa->Buffer->height - 1; \
- GLuint _w_ = dmesa->Buffer->width;
+ GLuint _b_ = dmesa->buffer->height - 1; \
+ GLuint _w_ = dmesa->buffer->width;
 
 #define RENDER_SPAN(span) \
  GLuint i, offset = FLIP2(span.y)*_w_ + span.x;				\
@@ -534,8 +531,8 @@ static void read_index_pixels (const GLcontext *ctx,
 
 #define SETUP_CODE \
  const DMesaContext dmesa = (DMesaContext)ctx; \
- GLuint _b_ = dmesa->Buffer->height - 1; \
- GLuint _w_ = dmesa->Buffer->width;
+ GLuint _b_ = dmesa->buffer->height - 1; \
+ GLuint _w_ = dmesa->buffer->width;
 
 #define RENDER_SPAN(span) \
  GLuint i, offset = FLIP2(span.y)*_w_ + span.x;				\
@@ -616,8 +613,8 @@ static void dmesa_choose_tri (GLcontext *ctx)
 
 #define SETUP_CODE \
  const DMesaContext dmesa = (DMesaContext)ctx; \
- GLuint _b_ = dmesa->Buffer->height - 1; \
- GLuint _w_ = dmesa->Buffer->width; \
+ GLuint _b_ = dmesa->buffer->height - 1; \
+ GLuint _w_ = dmesa->buffer->width; \
  GLuint rgb = vl_mixrgb(vert1->color);
 
 #define PLOT(X,Y) vl_putpixel(FLIP2(Y) * _w_ + X, rgb);
@@ -638,8 +635,8 @@ static void dmesa_choose_tri (GLcontext *ctx)
 
 #define SETUP_CODE \
  const DMesaContext dmesa = (DMesaContext)ctx; \
- GLuint _b_ = dmesa->Buffer->height - 1; \
- GLuint _w_ = dmesa->Buffer->width; \
+ GLuint _b_ = dmesa->buffer->height - 1; \
+ GLuint _w_ = dmesa->buffer->width; \
  GLuint rgb = vl_mixrgb(vert1->color);
 
 #define PLOT(X,Y) \
@@ -751,7 +748,7 @@ static void clear (GLcontext *ctx, GLbitfield mask, GLboolean all,
  /* we can't handle color or index masking */
  if ((*colorMask == 0xffffffff) && (ctx->Color.IndexMask == 0xffffffff)) {
     if (mask & DD_BACK_LEFT_BIT) {
-       int color = c->visual->rgb_flag ? c->ClearColor : c->ClearIndex;
+       int color = ((GLvisual *)(c->visual))->rgbMode ? c->ClearColor : c->ClearIndex;
 
        if (all) {
           vl_clear(color);
@@ -958,10 +955,6 @@ DMesaVisual DMesaCreateVisual (GLint width,
  GLint redBits, greenBits, blueBits, alphaBits, indexBits;
  GLboolean sw_alpha;
 
- if (!dbFlag) {
-    return NULL;
- }
-
  alphaBits = 0;
 
  if (!rgbFlag) {
@@ -1017,6 +1010,9 @@ DMesaVisual DMesaCreateVisual (GLint width,
  alphaBits = alphaSize;
  sw_alpha = (alphaBits > 0);
 
+ if (!dbFlag) {
+    return NULL;
+ }
  if ((colDepth=vl_video_init(width, height, colDepth, rgbFlag, refresh)) <= 0) {
     return NULL;
  }
@@ -1040,12 +1036,8 @@ DMesaVisual DMesaCreateVisual (GLint width,
                             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;
+    v->z_buffer = (depthSize > 0) ? 1 : 0;
  }
 
  return v;
@@ -1113,7 +1105,7 @@ DMesaBuffer DMesaCreateBuffer (DMesaVisual visual,
  if ((b=(DMesaBuffer)CALLOC_STRUCT(dmesa_buffer)) != NULL) {
     _mesa_initialize_framebuffer((GLframebuffer *)b,
                                  (GLvisual *)visual,
-                                 visual->zbuffer == 1,
+                                 visual->z_buffer == 1,
                                  ((GLvisual *)visual)->stencilBits > 0,
                                  ((GLvisual *)visual)->accumRedBits > 0,
                                  visual->sw_alpha);
@@ -1134,7 +1126,9 @@ DMesaBuffer DMesaCreateBuffer (DMesaVisual visual,
 void DMesaDestroyBuffer (DMesaBuffer b)
 {
 #ifndef FX
- free(b->the_window);
+ if (b->the_window != NULL) {
+    free(b->the_window);
+ }
  _mesa_destroy_framebuffer((GLframebuffer *)b);
 #endif
 }
@@ -1179,7 +1173,7 @@ DMesaContext DMesaCreateContext (DMesaVisual visual,
     tnl = TNL_CONTEXT(c);
     tnl->Driver.RunPipeline = _tnl_run_pipeline;
     /* swrast setup */
-    if (visual->rgb_flag) dmesa_register_swrast_functions(c);
+    if (((GLvisual *)visual)->rgbMode) dmesa_register_swrast_functions(c);
     dmesa_init_pointers(c);
     _swsetup_Wakeup(c);
  }
@@ -1212,19 +1206,16 @@ GLboolean DMesaMoveBuffer (GLint xpos, GLint ypos)
 {
 #ifndef FX
  GET_CURRENT_CONTEXT(ctx);
- DMesaBuffer b = ((DMesaContext)ctx)->Buffer;
+ DMesaBuffer b = ((DMesaContext)ctx)->buffer;
 
- if (vl_sync_buffer(&b->the_window, xpos, ypos, b->width, b->height) != 0) {
-    return GL_FALSE;
- } else {
+ if (vl_sync_buffer(&b->the_window, xpos, ypos, b->width, b->height) == 0) {
     b->xpos = xpos;
     b->ypos = ypos;
     return GL_TRUE;
  }
+#endif
 
-#else
  return GL_FALSE;
-#endif
 }
 
 
@@ -1233,19 +1224,16 @@ GLboolean DMesaResizeBuffer (GLint width, GLint height)
 {
 #ifndef FX
  GET_CURRENT_CONTEXT(ctx);
- DMesaBuffer b = ((DMesaContext)ctx)->Buffer;
+ DMesaBuffer b = ((DMesaContext)ctx)->buffer;
 
- if (vl_sync_buffer(&b->the_window, b->xpos, b->ypos, width, height) != 0) {
-    return GL_FALSE;
- } else {
+ if (vl_sync_buffer(&b->the_window, b->xpos, b->ypos, width, height) == 0) {
     b->width = width;
     b->height = height;
     return GL_TRUE;
  }
+#endif
 
-#else
  return GL_FALSE;
-#endif
 }
 
 
@@ -1261,7 +1249,7 @@ GLboolean DMesaMakeCurrent (DMesaContext c, DMesaBuffer b)
        return GL_FALSE;
     }
 
-    c->Buffer = b;
+    c->buffer = b;
 
     _mesa_make_current((GLcontext *)c, (GLframebuffer *)b);
     if (((GLcontext *)c)->Viewport.Width == 0) {
@@ -1391,6 +1379,21 @@ int DMesaGetIntegerv (GLenum pname, GLint *params)
               return n;
              }
              #endif
+        case DMESA_GET_BUFFER_ADDR:
+             #ifndef FX
+             {
+              DMesaContext c = (DMesaContext)DMesaGetCurrentContext();
+              if (c != NULL) {
+                 DMesaBuffer b = c->buffer;
+                 if (b != NULL) {
+                    params[0] = (GLint)b->the_window;
+                 }
+              }
+             }
+             #else
+             return -1;
+             #endif
+             break;
         default:
              return -1;
  }
diff --git a/src/mesa/drivers/dos/null.c b/src/mesa/drivers/dos/null.c
new file mode 100644
index 00000000000..62e2c942ef9
--- /dev/null
+++ b/src/mesa/drivers/dos/null.c
@@ -0,0 +1,222 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  4.1
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * DOS/DJGPP device driver v1.6 for Mesa
+ *
+ *  Copyright (C) 2002 - Borca Daniel
+ *  Email : [email protected]
+ *  Web   : http://www.geocities.com/dborca
+ */
+
+
+#include <stdlib.h>
+#include <sys/segments.h>
+
+#include "video.h"
+#include "null.h"
+
+
+
+static vl_mode *modes;
+
+#define null_color_precision 8
+
+
+
+
+static void null_blit_nop (void)
+{
+}
+
+
+
+/* Desc: Attempts to detect VGA, check video modes and create selectors.
+ *
+ * In  : -
+ * Out : mode array
+ *
+ * Note: -
+ */
+static vl_mode *null_init (void)
+{
+ static int m[][2] = {
+        {320, 200},
+        {320, 240},
+        {400, 300},
+        {512, 384},
+        {640, 400},
+        {640, 480},
+        {800, 600},
+        {1024, 768},
+        {1280, 1024},
+        {1600, 1200}
+ };
+ static int b[] = {
+        8,
+        15,
+        16,
+        24,
+        32
+ };
+
+ unsigned int i, j, k;
+
+ if (modes == NULL) {
+    modes = malloc(sizeof(vl_mode) *
+                   (1 + (sizeof(m) / sizeof(m[0]) * sizeof(b) / sizeof(b[0]))));
+
+    if (modes != NULL) {
+       for (k = 0, i = 0; i < sizeof(m) / sizeof(m[0]); i++) {
+           for (j = 0; j < sizeof(b) / sizeof(b[0]); j++, k++) {
+               modes[k].xres    = m[i][0];
+               modes[k].yres    = m[i][1];
+               modes[k].bpp     = b[j];
+               modes[k].mode    = 0x4000;
+               modes[k].scanlen = m[i][0] * ((b[j] + 7) / 8);
+               modes[k].sel     = -1;
+               modes[k].gran    = -1;
+           }
+       }
+       modes[k].xres    = -1;
+       modes[k].yres    = -1;
+       modes[k].bpp     = -1;
+       modes[k].mode    = 0xffff;
+       modes[k].scanlen = -1;
+       modes[k].sel     = -1;
+       modes[k].gran    = -1;
+    }
+ }
+
+ return modes;
+}
+
+
+
+/* Desc: Frees all resources allocated by VGA init code.
+ *
+ * In  : -
+ * Out : -
+ *
+ * Note: -
+ */
+static void null_fini (void)
+{
+}
+
+
+
+/* Desc: Attempts to enter specified video mode.
+ *
+ * In  : ptr to mode structure, refresh rate
+ * Out : 0 if success
+ *
+ * Note: -
+ */
+static int null_entermode (vl_mode *p, int refresh)
+{
+ NUL.blit = null_blit_nop;
+
+ return 0;
+
+ (void)(p && refresh); /* silence compiler warning */
+}
+
+
+
+/* Desc: Restores to the mode prior to first call to null_entermode.
+ *
+ * In  : -
+ * Out : -
+ *
+ * Note: -
+ */
+static void null_restore (void)
+{
+}
+
+
+
+/* Desc: set one palette entry
+ *
+ * In  : color index, R, G, B
+ * Out : -
+ *
+ * Note: uses integer values
+ */
+static void null_setCI_i (int index, int red, int green, int blue)
+{
+ (void)(index && red && green && blue); /* silence compiler warning */
+}
+
+
+
+/* Desc: set one palette entry
+ *
+ * In  : color index, R, G, B
+ * Out : -
+ *
+ * Note: uses normalized values
+ */
+static void null_setCI_f (int index, float red, float green, float blue)
+{
+ float max = (1 << null_color_precision) - 1;
+
+ null_setCI_i(index, (int)(red * max), (int)(green * max), (int)(blue * max));
+}
+
+
+
+/* Desc: state retrieval
+ *
+ * In  : parameter name, ptr to storage
+ * Out : 0 if request successfully processed
+ *
+ * Note: -
+ */
+static int null_get (int pname, int *params)
+{
+ switch (pname) {
+        default:
+             params[0] = params[0]; /* silence compiler warning */
+             return -1;
+ }
+ return 0;
+}
+
+
+
+/*
+ * the driver
+ */
+vl_driver NUL = {
+          null_init,
+          null_entermode,
+          NULL,
+          null_setCI_f,
+          null_setCI_i,
+          null_get,
+          null_restore,
+          null_fini
+};
diff --git a/src/mesa/drivers/dos/null.h b/src/mesa/drivers/dos/null.h
new file mode 100644
index 00000000000..a38accc8570
--- /dev/null
+++ b/src/mesa/drivers/dos/null.h
@@ -0,0 +1,41 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  4.0
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * DOS/DJGPP device driver v1.6 for Mesa
+ *
+ *  Copyright (C) 2002 - Borca Daniel
+ *  Email : [email protected]
+ *  Web   : http://www.geocities.com/dborca
+ */
+
+
+#ifndef NULL_H_included
+#define NULL_H_included
+
+#include "internal.h"
+
+extern vl_driver NUL;
+
+#endif
diff --git a/src/mesa/drivers/dos/video.c b/src/mesa/drivers/dos/video.c
index 41903ebe799..d3774e7c3e4 100644
--- a/src/mesa/drivers/dos/video.c
+++ b/src/mesa/drivers/dos/video.c
@@ -38,6 +38,7 @@
 #include "internal.h"
 #include "vesa.h"
 #include "vga.h"
+#include "null.h"
 #include "video.h"
 
 
@@ -428,6 +429,13 @@ static vl_mode *v_init_hw (void)
  static vl_mode *q = NULL;
 
  if (q == NULL) {
+    /* are we forced to NUL driver? */
+    if (getenv("DMESA_NULDRV")) {
+       if ((q = NUL.init()) != NULL) {
+          drv = &NUL;
+       }
+       return q;
+    }
     /* initialize hardware */
     if ((q = VESA.init()) != NULL) {
        drv = &VESA;