misc.c File Reference

#include <stdlib.h>
#include <string.h>
#include "accum.h"
#include "alphabuf.h"
#include "context.h"
#include "depth.h"
#include "macros.h"
#include "masking.h"
#include "misc.h"
#include "stencil.h"
#include "types.h"

Include dependency graph for misc.c:

Go to the source code of this file.

Functions
void	gl_ClearIndex (GLcontext *ctx, GLfloat c)
void	gl_ClearColor (GLcontext *ctx, GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
static void	clear_color_buffer_with_masking (GLcontext *ctx)
static void	clear_color_buffers (GLcontext *ctx)
void	gl_Clear (GLcontext *ctx, GLbitfield mask)
const GLubyte *	gl_GetString (GLcontext *ctx, GLenum name)
void	gl_Finish (GLcontext *ctx)
void	gl_Flush (GLcontext *ctx)
void	gl_Hint (GLcontext *ctx, GLenum target, GLenum mode)
void	gl_DrawBuffer (GLcontext *ctx, GLenum mode)
void	gl_ReadBuffer (GLcontext *ctx, GLenum mode)

Function Documentation

clear_color_buffer_with_masking()

static void clear_color_buffer_with_masking ( GLcontext *  ctx )

static

Definition at line 160 of file misc.c.

{
   GLint x, y, height, width;

   /* Compute region to clear */
   if (ctx->Scissor.Enabled) {
      x = ctx->Buffer->Xmin;
      y = ctx->Buffer->Ymin;
      height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
      width  = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
   }
   else {
      x = 0;
      y = 0;
      height = ctx->Buffer->Height;
      width  = ctx->Buffer->Width;
   }

   if (ctx->Visual->RGBAflag) {
      /* RGBA mode */
      GLubyte red[MAX_WIDTH], green[MAX_WIDTH];
      GLubyte blue[MAX_WIDTH], alpha[MAX_WIDTH];
      GLubyte r = ctx->Color.ClearColor[0] * ctx->Visual->RedScale;
      GLubyte g = ctx->Color.ClearColor[1] * ctx->Visual->GreenScale;
      GLubyte b = ctx->Color.ClearColor[2] * ctx->Visual->BlueScale;
      GLubyte a = ctx->Color.ClearColor[3] * ctx->Visual->AlphaScale;
      GLint i;
      for (i=0;i<height;i++,y++) {
         MEMSET( red,   (int) r, width );
         MEMSET( green, (int) g, width );
         MEMSET( blue,  (int) b, width );
         MEMSET( alpha, (int) a, width );
         gl_mask_color_span( ctx, width, x, y, red, green, blue, alpha );
         (*ctx->Driver.WriteColorSpan)( ctx,
                                 width, x, y, red, green, blue, alpha, NULL );
         if (ctx->RasterMask & ALPHABUF_BIT) {
            gl_write_alpha_span( ctx, width, x, y, alpha, NULL );
         }
      }
   }
   else {
      /* Color index mode */
      GLuint indx[MAX_WIDTH];
      GLubyte mask[MAX_WIDTH];
      GLint i, j;
      MEMSET( mask, 1, width );
      for (i=0;i<height;i++,y++) {
         for (j=0;j<width;j++) {
            indx[j] = ctx->Color.ClearIndex;
         }
         gl_mask_index_span( ctx, width, x, y, indx );
         (*ctx->Driver.WriteIndexSpan)( ctx, width, x, y, indx, mask );
      }
   }
}

Referenced by clear_color_buffers().

clear_color_buffers()

static void clear_color_buffers ( GLcontext *  ctx )

static

Definition at line 222 of file misc.c.

{
   if (ctx->Color.SWmasking) {
      clear_color_buffer_with_masking( ctx );
   }
   else {
      GLint x = ctx->Buffer->Xmin;
      GLint y = ctx->Buffer->Ymin;
      GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
      GLint width  = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
      (*ctx->Driver.Clear)( ctx, !ctx->Scissor.Enabled,
                            x, y, width, height );
      if (ctx->RasterMask & ALPHABUF_BIT) {
         /* front and/or back alpha buffers will be cleared here */
         gl_clear_alpha_buffers( ctx );
      }
   }

   if (ctx->RasterMask & FRONT_AND_BACK_BIT) {
      /*** Also clear the back buffer ***/
      (*ctx->Driver.SetBuffer)( ctx, GL_BACK );
      if (ctx->Color.SWmasking) {
         clear_color_buffer_with_masking( ctx );
      }
      else {
         GLint x = ctx->Buffer->Xmin;
         GLint y = ctx->Buffer->Ymin;
         GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
         GLint width  = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
         (*ctx->Driver.Clear)( ctx, !ctx->Scissor.Enabled,
                               x, y, width, height );
      }
      (*ctx->Driver.SetBuffer)( ctx, GL_FRONT );
   }
}

Referenced by gl_Clear().

gl_Clear()

void gl_Clear	(	GLcontext *	ctx,
		GLbitfield	mask
	)

Definition at line 260 of file misc.c.

{
#ifdef PROFILE
   GLdouble t0 = gl_time();
#endif

   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glClear" );
      return;
   }

   if (ctx->RenderMode==GL_RENDER) {
      if (ctx->NewState) {
         gl_update_state( ctx );
      }

      /* See if we can call device driver function to clear both the
       * color and depth buffers.
       */
      if (ctx->Driver.ClearColorAndDepth &&
          (mask & GL_COLOR_BUFFER_BIT) && (mask & GL_DEPTH_BUFFER_BIT)) {
         GLint x = ctx->Buffer->Xmin;
         GLint y = ctx->Buffer->Ymin;
         GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
         GLint width  = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
         (*ctx->Driver.ClearColorAndDepth)( ctx, !ctx->Scissor.Enabled,
                                            x, y, width, height );
         if (ctx->RasterMask & FRONT_AND_BACK_BIT) {
            /*** Also clear the back buffer ***/
            (*ctx->Driver.SetBuffer)( ctx, GL_BACK );
            (*ctx->Driver.ClearColorAndDepth)( ctx, !ctx->Scissor.Enabled,
                                               x, y, width, height );
            (*ctx->Driver.SetBuffer)( ctx, GL_FRONT );
         }
      }
      else {
         /* normal procedure for clearing buffers */
         if (mask & GL_COLOR_BUFFER_BIT)  clear_color_buffers( ctx );
         if (mask & GL_DEPTH_BUFFER_BIT)  (*ctx->Driver.ClearDepthBuffer)(ctx);
         if (mask & GL_ACCUM_BUFFER_BIT)   gl_clear_accum_buffer( ctx );
         if (mask & GL_STENCIL_BUFFER_BIT) gl_clear_stencil_buffer( ctx );
      }

#ifdef PROFILE
      ctx->ClearTime += gl_time() - t0;
      ctx->ClearCount++;
#endif
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_ClearColor()

void gl_ClearColor	(	GLcontext *	ctx,
		GLclampf	red,
		GLclampf	green,
		GLclampf	blue,
		GLclampf	alpha
	)

Definition at line 132 of file misc.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glClearColor" );
      return;
   }

   ctx->Color.ClearColor[0] = CLAMP( red,   0.0F, 1.0F );
   ctx->Color.ClearColor[1] = CLAMP( green, 0.0F, 1.0F );
   ctx->Color.ClearColor[2] = CLAMP( blue,  0.0F, 1.0F );
   ctx->Color.ClearColor[3] = CLAMP( alpha, 0.0F, 1.0F );

   if (ctx->Visual->RGBAflag) {
      GLubyte r = (GLint) (ctx->Color.ClearColor[0] * ctx->Visual->RedScale);
      GLubyte g = (GLint) (ctx->Color.ClearColor[1] * ctx->Visual->GreenScale);
      GLubyte b = (GLint) (ctx->Color.ClearColor[2] * ctx->Visual->BlueScale);
      GLubyte a = (GLint) (ctx->Color.ClearColor[3] * ctx->Visual->AlphaScale);
      (*ctx->Driver.ClearColor)( ctx, r, g, b, a );
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_ClearIndex()

void gl_ClearIndex	(	GLcontext *	ctx,
		GLfloat	c
	)

Definition at line 117 of file misc.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glClearIndex" );
      return;
   }
   ctx->Color.ClearIndex = (GLuint) c;
   if (!ctx->Visual->RGBAflag) {
      /* it's OK to call glClearIndex in RGBA mode but it should be a NOP */
      (*ctx->Driver.ClearIndex)( ctx, ctx->Color.ClearIndex );
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_DrawBuffer()

void gl_DrawBuffer	(	GLcontext *	ctx,
		GLenum	mode
	)

Definition at line 408 of file misc.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glDrawBuffer" );
      return;
   }
   switch (mode) {
      case GL_FRONT:
      case GL_FRONT_LEFT:
      case GL_FRONT_AND_BACK:
         if ( (*ctx->Driver.SetBuffer)( ctx, GL_FRONT ) == GL_FALSE ) {
            gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
            return;
         }
         ctx->Color.DrawBuffer = mode;
         ctx->Buffer->Alpha = ctx->Buffer->FrontAlpha;
     ctx->NewState |= NEW_RASTER_OPS;
         break;
      case GL_BACK:
      case GL_BACK_LEFT:
         if ( (*ctx->Driver.SetBuffer)( ctx, GL_BACK ) == GL_FALSE) {
            gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
            return;
         }
         ctx->Color.DrawBuffer = mode;
         ctx->Buffer->Alpha = ctx->Buffer->BackAlpha;
     ctx->NewState |= NEW_RASTER_OPS;
         break;
      case GL_NONE:
         ctx->Color.DrawBuffer = mode;
         ctx->Buffer->Alpha = NULL;
         ctx->NewState |= NEW_RASTER_OPS;
         break;
      case GL_FRONT_RIGHT:
      case GL_BACK_RIGHT:
      case GL_LEFT:
      case GL_RIGHT:
      case GL_AUX0:
         gl_error( ctx, GL_INVALID_OPERATION, "glDrawBuffer" );
         break;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
   }
}

Referenced by execute_list(), gl_PopAttrib(), and init_exec_pointers().

gl_Finish()

void gl_Finish

(

GLcontext *

ctx

)

Definition at line 346 of file misc.c.

{
   /* Don't compile into display list */
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glFinish" );
      return;
   }
   if (ctx->Driver.Finish) {
      (*ctx->Driver.Finish)( ctx );
   }
}

Referenced by init_dlist_pointers(), and init_exec_pointers().

gl_Flush()

void gl_Flush

(

GLcontext *

ctx

)

Definition at line 360 of file misc.c.

{
   /* Don't compile into display list */
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glFlush" );
      return;
   }
   if (ctx->Driver.Flush) {
      (*ctx->Driver.Flush)( ctx );
   }
}

Referenced by init_dlist_pointers(), and init_exec_pointers().

gl_GetString()

const GLubyte* gl_GetString	(	GLcontext *	ctx,
		GLenum	name
	)

Definition at line 312 of file misc.c.

{
   static char renderer[1000];
   static char *vendor = "Brian Paul & ReactOS Developers";
   static char *version = "1.1";
   static char *extensions = "GL_EXT_paletted_texture GL_EXT_bgra GL_WIN_swap_hint";

   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glGetString" );
      return (GLubyte *) 0;
   }

   switch (name) {
      case GL_VENDOR:
         return (GLubyte *) vendor;
      case GL_RENDERER:
         strcpy(renderer, "Mesa");
         if (ctx->Driver.RendererString) {
            strcat(renderer, " ");
            strcat(renderer, (*ctx->Driver.RendererString)());
         }
         return (GLubyte *) renderer;
      case GL_VERSION:
         return (GLubyte *) version;
      case GL_EXTENSIONS:
         return (GLubyte *) extensions;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glGetString" );
         return (GLubyte *) 0;
   }
}

Referenced by init_dlist_pointers(), and init_exec_pointers().

gl_Hint()

void gl_Hint	(	GLcontext *	ctx,
		GLenum	target,
		GLenum	mode
	)

Definition at line 374 of file misc.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glHint" );
      return;
   }
   if (mode!=GL_DONT_CARE && mode!=GL_FASTEST && mode!=GL_NICEST) {
      gl_error( ctx, GL_INVALID_ENUM, "glHint(mode)" );
      return;
   }
   switch (target) {
      case GL_FOG_HINT:
         ctx->Hint.Fog = mode;
         break;
      case GL_LINE_SMOOTH_HINT:
         ctx->Hint.LineSmooth = mode;
         break;
      case GL_PERSPECTIVE_CORRECTION_HINT:
         ctx->Hint.PerspectiveCorrection = mode;
         break;
      case GL_POINT_SMOOTH_HINT:
         ctx->Hint.PointSmooth = mode;
         break;
      case GL_POLYGON_SMOOTH_HINT:
         ctx->Hint.PolygonSmooth = mode;
         break;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glHint(target)" );
   }
   ctx->NewState |= NEW_ALL;   /* just to be safe */
}

Referenced by execute_list(), and init_exec_pointers().

gl_ReadBuffer()

void gl_ReadBuffer	(	GLcontext *	ctx,
		GLenum	mode
	)

Definition at line 455 of file misc.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glReadBuffer" );
      return;
   }
   switch (mode) {
      case GL_FRONT:
      case GL_FRONT_LEFT:
         if ( (*ctx->Driver.SetBuffer)( ctx, GL_FRONT ) == GL_FALSE) {
            gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
            return;
         }
         ctx->Pixel.ReadBuffer = mode;
         ctx->Buffer->Alpha = ctx->Buffer->FrontAlpha;
         ctx->NewState |= NEW_RASTER_OPS;
         break;
      case GL_BACK:
      case GL_BACK_LEFT:
         if ( (*ctx->Driver.SetBuffer)( ctx, GL_BACK ) == GL_FALSE) {
            gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
            return;
         }
         ctx->Pixel.ReadBuffer = mode;
         ctx->Buffer->Alpha = ctx->Buffer->BackAlpha;
         ctx->NewState |= NEW_RASTER_OPS;
         break;
      case GL_FRONT_RIGHT:
      case GL_BACK_RIGHT:
      case GL_LEFT:
      case GL_RIGHT:
      case GL_AUX0:
         gl_error( ctx, GL_INVALID_OPERATION, "glReadBuffer" );
         break;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
   }

   /* Remember, the draw buffer is the default state */
   (void) (*ctx->Driver.SetBuffer)( ctx, ctx->Color.DrawBuffer );
}

Referenced by execute_list(), and init_exec_pointers().