Updates for DOS driver from Daniel Borca.

2 files changed, 116 insertions, 131 deletions

diff --git a/src/mesa/drivers/dos/dmesa.c b/src/mesa/drivers/dos/dmesa.c
index 474d1336e3..77c9a3a1b8 100644
--- a/src/mesa/drivers/dos/dmesa.c
+++ b/src/mesa/drivers/dos/dmesa.c
@@ -1,6 +1,6 @@
 /*

  * Mesa 3-D graphics library

- * Version:  4.0

+ * Version:  4.1

  * 

  * Copyright (C) 1999  Brian Paul   All Rights Reserved.

  * 

@@ -23,7 +23,7 @@
  */

 

 /*

- * DOS/DJGPP device driver v1.1 for Mesa 4.0

+ * DOS/DJGPP device driver v1.2 for Mesa 4.1

  *

  *  Copyright (C) 2002 - Borca Daniel

  *  Email : dborca@yahoo.com

@@ -94,25 +94,16 @@ struct dmesa_context {
 

 

 

-static void dmesa_update_state (GLcontext *ctx, GLuint new_state);

-

-

-

-/**********************************************************************/

-/*****            Read/Write pixels                               *****/

-/**********************************************************************/

-

-

-

+/****************************************************************************

+ * Read/Write pixels

+ ***************************************************************************/

 #define FLIP(y)  (c->Buffer->height - (y) - 1)

 #define FLIP2(y) (h - (y) - 1)

 

-

-

 static void write_rgba_span (const GLcontext *ctx, GLuint n, GLint x, GLint y,

                              const GLubyte rgba[][4], const GLubyte mask[])

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint i, offset;

 

@@ -132,10 +123,12 @@ static void write_rgba_span (const GLcontext *ctx, GLuint n, GLint x, GLint y,
  }

 }

 

+

+

 static void write_rgb_span (const GLcontext *ctx, GLuint n, GLint x, GLint y,

                             const GLubyte rgb[][3], const GLubyte mask[])

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint i, offset;

 

@@ -155,11 +148,13 @@ static void write_rgb_span (const GLcontext *ctx, GLuint n, GLint x, GLint y,
  }

 }

 

+

+

 static void write_mono_rgba_span (const GLcontext *ctx,

                                   GLuint n, GLint x, GLint y,

                                   const GLchan color[4], const GLubyte mask[])

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint i, offset, rgba = vl_mixrgba(color);

 

@@ -179,10 +174,12 @@ static void write_mono_rgba_span (const GLcontext *ctx,
  }

 }

 

+

+

 static void read_rgba_span (const GLcontext *ctx, GLuint n, GLint x, GLint y,

                             GLubyte rgba[][4])

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint i, offset;

 

@@ -193,11 +190,13 @@ static void read_rgba_span (const GLcontext *ctx, GLuint n, GLint x, GLint y,
  }

 }

 

+

+

 static void write_rgba_pixels (const GLcontext *ctx,

                                GLuint n, const GLint x[], const GLint y[],

                                const GLubyte rgba[][4], const GLubyte mask[])

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint i, w = c->Buffer->width, h = c->Buffer->height;

 

@@ -216,11 +215,13 @@ static void write_rgba_pixels (const GLcontext *ctx,
  }

 }

 

+

+

 static void write_mono_rgba_pixels (const GLcontext *ctx,

                                     GLuint n, const GLint x[], const GLint y[],

                                     const GLchan color[4], const GLubyte mask[])

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint i, w = c->Buffer->width, h = c->Buffer->height, rgba = vl_mixrgba(color);

 

@@ -239,11 +240,13 @@ static void write_mono_rgba_pixels (const GLcontext *ctx,
  }

 }

 

+

+

 static void read_rgba_pixels (const GLcontext *ctx,

                               GLuint n, const GLint x[], const GLint y[],

                               GLubyte rgba[][4], const GLubyte mask[])

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint i, w = c->Buffer->width, h = c->Buffer->height;

 

@@ -264,11 +267,9 @@ static void read_rgba_pixels (const GLcontext *ctx,
 

 

 

-/**********************************************************************/

-/*****                   Optimized triangle rendering             *****/

-/**********************************************************************/

-

-

+/****************************************************************************

+ * Optimized triangle rendering

+ ***************************************************************************/

 

 /*

  * flat, NON-depth-buffered, triangle.

@@ -278,7 +279,7 @@ static void tri_rgb_flat (GLcontext *ctx,
                           const SWvertex *v1,

                           const SWvertex *v2)

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint w = c->Buffer->width, h = c->Buffer->height;

 

@@ -286,7 +287,7 @@ static void tri_rgb_flat (GLcontext *ctx,
 

 #define RENDER_SPAN(span)					\

  GLuint i, offset = FLIP2(span.y)*w + span.x;			\

- for (i = 0; i < span.count; i++, offset++) {			\

+ for (i = 0; i < span.end; i++, offset++) {			\

      vl_putpixel(b, offset, rgb);				\

  }

 

@@ -303,7 +304,7 @@ static void tri_rgb_flat_z (GLcontext *ctx,
                             const SWvertex *v1,

                             const SWvertex *v2)

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint w = c->Buffer->width, h = c->Buffer->height;

 

@@ -313,7 +314,7 @@ static void tri_rgb_flat_z (GLcontext *ctx,
 

 #define RENDER_SPAN(span)					\

  GLuint i, offset = FLIP2(span.y)*w + span.x;			\

- for (i = 0; i < span.count; i++, offset++) {			\

+ for (i = 0; i < span.end; i++, offset++) {			\

      const DEPTH_TYPE z = FixedToDepth(span.z);			\

      if (z < zRow[i]) {						\

         vl_putpixel(b, offset, rgb);				\

@@ -335,14 +336,14 @@ static void tri_rgb_smooth (GLcontext *ctx,
                             const SWvertex *v1,

                             const SWvertex *v2)

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint w = c->Buffer->width, h = c->Buffer->height;

 

 #define INTERP_RGB 1

 #define RENDER_SPAN(span)					\

  GLuint i, offset = FLIP2(span.y)*w + span.x;			\

- for (i = 0; i < span.count; i++, offset++) {			\

+ for (i = 0; i < span.end; i++, offset++) {			\

      unsigned char rgb[3];					\

      rgb[0] = FixedToInt(span.red);				\

      rgb[1] = FixedToInt(span.green);				\

@@ -366,7 +367,7 @@ static void tri_rgb_smooth_z (GLcontext *ctx,
                               const SWvertex *v1,

                               const SWvertex *v2)

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  void *b = c->Buffer->the_window;

  GLuint w = c->Buffer->width, h = c->Buffer->height;

 

@@ -376,7 +377,7 @@ static void tri_rgb_smooth_z (GLcontext *ctx,
 

 #define RENDER_SPAN(span)					\

  GLuint i, offset = FLIP2(span.y)*w + span.x;			\

- for (i = 0; i < span.count; i++, offset++) {			\

+ for (i = 0; i < span.end; i++, offset++) {			\

      const DEPTH_TYPE z = FixedToDepth(span.z);			\

      if (z < zRow[i]) {						\

         unsigned char rgb[3];					\

@@ -455,15 +456,13 @@ static void dmesa_choose_tri (GLcontext *ctx)
 

 

 

-/**********************************************************************/

-/*****              Miscellaneous device driver funcs             *****/

-/**********************************************************************/

+/****************************************************************************

+ * Miscellaneous device driver funcs

+ ***************************************************************************/

 

-

-

-static void clear_color (GLcontext *ctx, const GLchan color[4])

+static void clear_color (GLcontext *ctx, const GLfloat color[4])

 {

- const GLubyte col[4];

+ GLubyte col[4];

  DMesaContext c = (DMesaContext)ctx->DriverCtx;

  CLAMPED_FLOAT_TO_UBYTE(col[0], color[0]);

  CLAMPED_FLOAT_TO_UBYTE(col[1], color[1]);

@@ -477,7 +476,7 @@ static void clear_color (GLcontext *ctx, const GLchan color[4])
 static void clear (GLcontext *ctx, GLbitfield mask, GLboolean all,

                    GLint x, GLint y, GLint width, GLint height)

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

+ const DMesaContext c = (DMesaContext)ctx->DriverCtx;

  const GLuint *colorMask = (GLuint *)&ctx->Color.ColorMask;

  DMesaBuffer b = c->Buffer;

 

@@ -508,27 +507,29 @@ static void clear (GLcontext *ctx, GLbitfield mask, GLboolean all,
 

 

 

-/*

- * Set the current reading buffer.

- */

-static void set_read_buffer (GLcontext *ctx, GLframebuffer *buffer,

-                             GLenum mode)

+static void color_mask (GLcontext *ctx, GLboolean rmask, GLboolean gmask, GLboolean bmask, GLboolean amask)

 {

-   /*

-     XXX this has to be fixed

-   */

+ /*

+  * XXX todo - Implements glColorMask()

+  */

 }

 

 

 

-/*

- * Set the destination/draw buffer.

- */

-static void set_draw_buffer (GLcontext *ctx, GLenum mode)

+static void set_buffer (GLcontext *ctx, GLframebuffer *colorBuffer, GLuint bufferBit)

 {

-   /*

-     XXX this has to be fixed

-   */

+ /*

+  * XXX todo - examine bufferBit and set read/write pointers

+  */

+}

+

+

+

+static void enable (GLcontext *ctx, GLenum pname, GLboolean state)

+{

+ /*

+  *  XXX todo -

+  */

 }

 

 

@@ -552,7 +553,7 @@ static const GLubyte* get_string (GLcontext *ctx, GLenum name)
 {

  switch (name) {

         case GL_RENDERER:

-             return (const GLubyte *)"Mesa DJGPP\0port (c) Borca Daniel 3-sep-2002";

+             return (const GLubyte *)"Mesa DJGPP\0port (c) Borca Daniel nov-2002";

         default:

              return NULL;

  }

@@ -560,38 +561,27 @@ static const GLubyte* get_string (GLcontext *ctx, GLenum name)
 

 

 

-/**********************************************************************/

-/*****              Miscellaneous device driver funcs             *****/

-/*****           Note that these functions are mandatory          *****/

-/**********************************************************************/

-

-

-

-/* OPTIONAL FUNCTION: implements glFinish if possible */

 static void finish (GLcontext *ctx)

 {

-/*

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

-*/

+ /*

+  * XXX todo - OPTIONAL FUNCTION: implements glFinish if possible

+  */

 }

 

 

 

-/* OPTIONAL FUNCTION: implements glFlush if possible */

 static void flush (GLcontext *ctx)

 {

-/*

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

-*/

+ /*

+  * XXX todo - OPTIONAL FUNCTION: implements glFlush if possible

+  */

 }

 

 

 

-/**********************************************************************/

-/**********************************************************************/

-

-

-

+/****************************************************************************

+ * State

+ ***************************************************************************/

 #define DMESA_NEW_TRIANGLE (_NEW_POLYGON | \

                             _NEW_TEXTURE | \

                             _NEW_LIGHT | \

@@ -599,8 +589,6 @@ static void flush (GLcontext *ctx)
                             _NEW_RENDERMODE | \

                             _SWRAST_NEW_RASTERMASK)

 

-

-

 /* Extend the software rasterizer with our line and triangle

  * functions.

  */

@@ -618,11 +606,10 @@ static void dmesa_register_swrast_functions (GLcontext *ctx)
 /* Setup pointers and other driver state that is constant for the life

  * of a context.

  */

-void dmesa_init_pointers (GLcontext *ctx)

+static void dmesa_init_pointers (GLcontext *ctx)

 {

  TNLcontext *tnl;

-

- ctx->Driver.UpdateState = dmesa_update_state;

+ struct swrast_device_driver *dd = _swrast_GetDeviceDriverReference(ctx);

 

  ctx->Driver.GetString = get_string;

  ctx->Driver.GetBufferSize = get_buffer_size;

@@ -638,6 +625,7 @@ void dmesa_init_pointers (GLcontext *ctx)
  ctx->Driver.CopyPixels = _swrast_CopyPixels;

  ctx->Driver.DrawPixels = _swrast_DrawPixels;

  ctx->Driver.ReadPixels = _swrast_ReadPixels;

+ ctx->Driver.DrawBuffer = _swrast_DrawBuffer;

 

  /* Software texture functions:

   */

@@ -650,6 +638,12 @@ void dmesa_init_pointers (GLcontext *ctx)
  ctx->Driver.TexSubImage3D = _mesa_store_texsubimage3d;

  ctx->Driver.TestProxyTexImage = _mesa_test_proxy_teximage;

 

+ ctx->Driver.CopyTexImage1D = _swrast_copy_teximage1d;

+ ctx->Driver.CopyTexImage2D = _swrast_copy_teximage2d;

+ ctx->Driver.CopyTexSubImage1D = _swrast_copy_texsubimage1d;

+ ctx->Driver.CopyTexSubImage2D = _swrast_copy_texsubimage2d;

+ ctx->Driver.CopyTexSubImage3D = _swrast_copy_texsubimage3d;

+

  ctx->Driver.CompressedTexImage1D = _mesa_store_compressed_teximage1d;

  ctx->Driver.CompressedTexImage2D = _mesa_store_compressed_teximage2d;

  ctx->Driver.CompressedTexImage3D = _mesa_store_compressed_teximage3d;

@@ -657,12 +651,6 @@ void dmesa_init_pointers (GLcontext *ctx)
  ctx->Driver.CompressedTexSubImage2D = _mesa_store_compressed_texsubimage2d;

  ctx->Driver.CompressedTexSubImage3D = _mesa_store_compressed_texsubimage3d;

 

- ctx->Driver.CopyTexImage1D = _swrast_copy_teximage1d;

- ctx->Driver.CopyTexImage2D = _swrast_copy_teximage2d;

- ctx->Driver.CopyTexSubImage1D = _swrast_copy_texsubimage1d;

- ctx->Driver.CopyTexSubImage2D = _swrast_copy_texsubimage2d;

- ctx->Driver.CopyTexSubImage3D = _swrast_copy_texsubimage3d;

-

  /* Swrast hooks for imaging extensions:

   */

  ctx->Driver.CopyColorTable = _swrast_CopyColorTable;

@@ -672,13 +660,16 @@ void dmesa_init_pointers (GLcontext *ctx)
 

  /* Statechange callbacks:

   */

- ctx->Driver.SetDrawBuffer = set_draw_buffer;

  ctx->Driver.ClearColor = clear_color;

+ ctx->Driver.ColorMask = color_mask;

+ ctx->Driver.Enable = enable;

 

  /* Initialize the TNL driver interface:

   */

  tnl = TNL_CONTEXT(ctx);

  tnl->Driver.RunPipeline = _tnl_run_pipeline;

+

+ dd->SetBuffer = set_buffer;

    

  /* Install swsetup for tnl->Driver.Render.*:

   */

@@ -689,36 +680,31 @@ void dmesa_init_pointers (GLcontext *ctx)
 

 static void dmesa_update_state (GLcontext *ctx, GLuint new_state)

 {

- DMesaContext c = (DMesaContext)ctx->DriverCtx;

- struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);

+ struct swrast_device_driver *dd = _swrast_GetDeviceDriverReference(ctx);

 

- /* Initialize all the pointers in the DD struct.  Do this whenever */

- /* a new context is made current or we change buffers via set_buffer! */

-

- _swrast_InvalidateState(ctx, new_state);

- _swsetup_InvalidateState(ctx, new_state);

- _ac_InvalidateState(ctx, new_state);

- _tnl_InvalidateState(ctx, new_state);

-

- swdd->SetReadBuffer = set_read_buffer;

+ /* Propogate statechange information to swrast and swrast_setup

+  * modules. The DMesa driver has no internal GL-dependent state.

+  */

+ _swrast_InvalidateState( ctx, new_state );

+ _ac_InvalidateState( ctx, new_state );

+ _tnl_InvalidateState( ctx, new_state );

+ _swsetup_InvalidateState( ctx, new_state );

 

  /* RGB(A) span/pixel functions */

- swdd->WriteRGBASpan = write_rgba_span;

- swdd->WriteRGBSpan = write_rgb_span;

- swdd->WriteMonoRGBASpan = write_mono_rgba_span;

- swdd->WriteRGBAPixels = write_rgba_pixels;

- swdd->WriteMonoRGBAPixels = write_mono_rgba_pixels;

- swdd->ReadRGBASpan = read_rgba_span;

- swdd->ReadRGBAPixels = read_rgba_pixels;

+ dd->WriteRGBASpan = write_rgba_span;

+ dd->WriteRGBSpan = write_rgb_span;

+ dd->WriteMonoRGBASpan = write_mono_rgba_span;

+ dd->WriteRGBAPixels = write_rgba_pixels;

+ dd->WriteMonoRGBAPixels = write_mono_rgba_pixels;

+ dd->ReadRGBASpan = read_rgba_span;

+ dd->ReadRGBAPixels = read_rgba_pixels;

 }

 

 

 

-/**********************************************************************/

-/*****               DMesa Public API Functions                   *****/

-/**********************************************************************/

-

-

+/****************************************************************************

+ * DMesa Public API Functions

+ ***************************************************************************/

 

 /*

  * The exact arguments to this function will depend on your window system

@@ -731,15 +717,13 @@ DMesaVisual DMesaCreateVisual (GLint width, GLint height, GLint colDepth,
  DMesaVisual v;

  GLint redBits, greenBits, blueBits, alphaBits;

 

- int refresh;

  char *var = getenv("DMESA_REFRESH");

- if ((var == NULL) || ((refresh=atoi(var)) == 0)) {

-    refresh = 60;

- }

+ int refresh = (var != NULL) ? atoi(var) : 0;

 

  if (!dbFlag) {

     return NULL;

  }

+

  alphaBits = 0;

  switch (colDepth) {

         case 15:

@@ -767,7 +751,7 @@ DMesaVisual DMesaCreateVisual (GLint width, GLint height, GLint colDepth,
     return NULL;

  }

 

- if ((v=(DMesaVisual)calloc(1, sizeof(struct dmesa_visual)))!=NULL) {

+ if ((v=(DMesaVisual)calloc(1, sizeof(struct dmesa_visual))) != NULL) {

     /* Create core visual */

     v->gl_visual = _mesa_create_visual(colDepth>8,		/* rgb */

                                        dbFlag,

@@ -809,7 +793,7 @@ DMesaBuffer DMesaCreateBuffer (DMesaVisual visual,
 {

  DMesaBuffer b;

 

- if ((b=(DMesaBuffer)calloc(1, sizeof(struct dmesa_buffer)))!=NULL) {

+ if ((b=(DMesaBuffer)calloc(1, sizeof(struct dmesa_buffer))) != NULL) {

 

     _mesa_initialize_framebuffer(&b->gl_buffer,

                                  visual->gl_visual,

@@ -844,7 +828,7 @@ DMesaContext DMesaCreateContext (DMesaVisual visual,
  DMesaContext c;

  GLboolean direct = GL_FALSE;

 

- if ((c=(DMesaContext)calloc(1, sizeof(struct dmesa_context)))!=NULL) {

+ if ((c=(DMesaContext)calloc(1, sizeof(struct dmesa_context))) != NULL) {

     c->gl_ctx = _mesa_create_context(visual->gl_visual,

                                      share ? share->gl_ctx : NULL,

                                      (void *)c, direct);

@@ -852,17 +836,19 @@ DMesaContext DMesaCreateContext (DMesaVisual visual,
     _mesa_enable_sw_extensions(c->gl_ctx);

     _mesa_enable_1_3_extensions(c->gl_ctx);

 

-   /* you probably have to do a bunch of other initializations here. */

+    /* you probably have to do a bunch of other initializations here. */

     c->visual = visual;

 

-   /* Initialize the software rasterizer and helper modules.

-    */

+    c->gl_ctx->Driver.UpdateState = dmesa_update_state;

+

+    /* Initialize the software rasterizer and helper modules.

+     */

     _swrast_CreateContext(c->gl_ctx);

     _ac_CreateContext(c->gl_ctx);

     _tnl_CreateContext(c->gl_ctx);

     _swsetup_CreateContext(c->gl_ctx);

-    dmesa_init_pointers(c->gl_ctx);

     dmesa_register_swrast_functions(c->gl_ctx);

+    dmesa_init_pointers(c->gl_ctx);

  }

 

  return c;

@@ -884,7 +870,7 @@ GLboolean DMesaViewport (DMesaBuffer b,
 {

  void *new_window;

 

- if ((new_window=vl_sync_buffer(b->the_window, xpos, ypos, width, height))==NULL) {

+ if ((new_window=vl_sync_buffer(b->the_window, xpos, ypos, width, height)) == NULL) {

     return GL_FALSE;

  } else {

     b->the_window = new_window;

@@ -905,16 +891,15 @@ GLboolean DMesaViewport (DMesaBuffer b,
  */

 GLboolean DMesaMakeCurrent (DMesaContext c, DMesaBuffer b)

 {

- if (c&&b) {

+ if ((c != NULL) && (b != NULL)) {

     if (!DMesaViewport(b, b->xpos, b->ypos, b->width, b->height)) {

        return GL_FALSE;

     }

 

     c->Buffer = b;

 

-    dmesa_update_state(c->gl_ctx, 0);

     _mesa_make_current(c->gl_ctx, &b->gl_buffer);

-    if (c->gl_ctx->Viewport.Width==0) {

+    if (c->gl_ctx->Viewport.Width == 0) {

        /* initialize viewport to window size */

        _mesa_Viewport(0, 0, b->width, b->height);

     }

diff --git a/src/mesa/drivers/dos/vesa/vesa.c b/src/mesa/drivers/dos/vesa/vesa.c
index c43b6ec428..8dbeb9e52c 100644
--- a/src/mesa/drivers/dos/vesa/vesa.c
+++ b/src/mesa/drivers/dos/vesa/vesa.c
@@ -1,6 +1,6 @@
 /*

  * Mesa 3-D graphics library

- * Version:  4.0

+ * Version:  4.1

  * 

  * Copyright (C) 1999  Brian Paul   All Rights Reserved.

  * 

@@ -23,7 +23,7 @@
  */

 

 /*

- * DOS/DJGPP device driver v1.1 for Mesa 4.0

+ * DOS/DJGPP device driver v1.2 for Mesa 4.1

  *

  *  Copyright (C) 2002 - Borca Daniel

  *  Email : dborca@yahoo.com

@@ -337,7 +337,7 @@ static int vesa_entermode (vl_mode *p, int refresh)
  r.x.ax = 0x4f02;

  r.x.bx = p->mode;

 

- if ((vesa_ver>>8) >= 3) {

+ if (refresh && ((vesa_ver>>8) >= 3)) {

     /* VESA 3.0 stuff for controlling the refresh rate */

     CRTCInfoBlock crtc;

     unsigned long vclk;