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/*

 * Mesa 3-D graphics library

 * Version:  7.1

 *

 * Copyright (C) 1999-2008  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.

 */

#include "glheader.h"

#include "imports.h"

#include "bufferobj.h"

#include "context.h"

#include "drawpix.h"

#include "enums.h"

#include "feedback.h"

#include "framebuffer.h"

#include "readpix.h"

#include "state.h"

#include "dispatch.h"

#if FEATURE_drawpix

/*

 * Execute glDrawPixels

 */

static void GLAPIENTRY

_mesa_DrawPixels( GLsizei width, GLsizei height,

                  GLenum format, GLenum type, const GLvoid *pixels )

{

   GET_CURRENT_CONTEXT(ctx);

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (width < 0 || height < 0) {

      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );

      return;

   }

   /* We're not using the current vertex program, and the driver may install

    * its own.  Note: this may dirty some state.

    */

   _mesa_set_vp_override(ctx, GL_TRUE);

   /* Note: this call does state validation */

   if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {

      goto end;      /* the error code was recorded */

   }

   if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {

      goto end;      /* the error code was recorded */

   }

   if (!ctx->Current.RasterPosValid) {

      goto end;  /* no-op, not an error */

   }

   if (ctx->RenderMode == GL_RENDER) {

      if (width > 0 && height > 0) {

         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */

         GLint x = IROUND(ctx->Current.RasterPos[0]);

         GLint y = IROUND(ctx->Current.RasterPos[1]);

         if (ctx->Unpack.BufferObj->Name) {

            /* unpack from PBO */

            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,

                                           format, type, pixels)) {

               _mesa_error(ctx, GL_INVALID_OPERATION,

                           "glDrawPixels(invalid PBO access)");

               goto end;

            }

            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {

               /* buffer is mapped - that's an error */

               _mesa_error(ctx, GL_INVALID_OPERATION,

                           "glDrawPixels(PBO is mapped)");

               goto end;

            }

         }

         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,

                                &ctx->Unpack, pixels);

      }

   }

   else if (ctx->RenderMode == GL_FEEDBACK) {

      /* Feedback the current raster pos info */

      FLUSH_CURRENT( ctx, 0 );

      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );

      _mesa_feedback_vertex( ctx,

                             ctx->Current.RasterPos,

                             ctx->Current.RasterColor,

                             ctx->Current.RasterTexCoords[0] );

   }

   else {

      ASSERT(ctx->RenderMode == GL_SELECT);

      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */

   }

end:

   _mesa_set_vp_override(ctx, GL_FALSE);

}

static void GLAPIENTRY

_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,

                  GLenum type )

{

   GET_CURRENT_CONTEXT(ctx);

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (width < 0 || height < 0) {

      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");

      return;

   }

   /* Note: more detailed 'type' checking is done by the

    * _mesa_source/dest_buffer_exists() calls below.  That's where we

    * check if the stencil buffer exists, etc.

    */

   if (type != GL_COLOR &&

       type != GL_DEPTH &&

       type != GL_STENCIL &&

       type != GL_DEPTH_STENCIL) {

      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",

                  _mesa_lookup_enum_by_nr(type));

      return;

   }

   /* We're not using the current vertex program, and the driver may install

    * it's own.  Note: this may dirty some state.

    */

   _mesa_set_vp_override(ctx, GL_TRUE);

   /* Note: this call does state validation */

   if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {

      goto end;      /* the error code was recorded */

   }

   /* Check read buffer's status (draw buffer was already checked) */

   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {

      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,

                  "glCopyPixels(incomplete framebuffer)" );

      goto end;

   }

   if (!_mesa_source_buffer_exists(ctx, type) ||

       !_mesa_dest_buffer_exists(ctx, type)) {

      _mesa_error(ctx, GL_INVALID_OPERATION,

                  "glCopyPixels(missing source or dest buffer)");

      goto end;

   }

   if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {

      goto end; /* no-op, not an error */

   }

   if (ctx->RenderMode == GL_RENDER) {

      /* Round to satisfy conformance tests (matches SGI's OpenGL) */

      if (width > 0 && height > 0) {

         GLint destx = IROUND(ctx->Current.RasterPos[0]);

         GLint desty = IROUND(ctx->Current.RasterPos[1]);

         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,

                                 type );

      }

   }

   else if (ctx->RenderMode == GL_FEEDBACK) {

      FLUSH_CURRENT( ctx, 0 );

      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );

      _mesa_feedback_vertex( ctx,

                             ctx->Current.RasterPos,

                             ctx->Current.RasterColor,

                             ctx->Current.RasterTexCoords[0] );

   }

   else {

      ASSERT(ctx->RenderMode == GL_SELECT);

      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */

   }

end:

   _mesa_set_vp_override(ctx, GL_FALSE);

}

static void GLAPIENTRY

_mesa_Bitmap( GLsizei width, GLsizei height,

              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,

              const GLubyte *bitmap )

{

   GET_CURRENT_CONTEXT(ctx);

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (width < 0 || height < 0) {

      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );

      return;

   }

   if (!ctx->Current.RasterPosValid) {

      return;    /* do nothing */

   }

   /* Note: this call does state validation */

   if (!_mesa_valid_to_render(ctx, "glBitmap")) {

      /* the error code was recorded */

      return;

   }

   if (ctx->RenderMode == GL_RENDER) {

      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */

      if (width > 0 && height > 0) {

         const GLfloat epsilon = 0.0001F;

         GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);

         GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);

         if (ctx->Unpack.BufferObj->Name) {

            /* unpack from PBO */

            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,

                                           GL_COLOR_INDEX, GL_BITMAP,

                                           (GLvoid *) bitmap)) {

               _mesa_error(ctx, GL_INVALID_OPERATION,

                           "glBitmap(invalid PBO access)");

               return;

            }

            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {

               /* buffer is mapped - that's an error */

               _mesa_error(ctx, GL_INVALID_OPERATION,

                           "glBitmap(PBO is mapped)");

               return;

            }

         }

         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );

      }

   }

#if _HAVE_FULL_GL

   else if (ctx->RenderMode == GL_FEEDBACK) {

      FLUSH_CURRENT(ctx, 0);

      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );

      _mesa_feedback_vertex( ctx,

                             ctx->Current.RasterPos,

                             ctx->Current.RasterColor,

                             ctx->Current.RasterTexCoords[0] );

   }

   else {

      ASSERT(ctx->RenderMode == GL_SELECT);

      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */

   }

#endif

   /* update raster position */

   ctx->Current.RasterPos[0] += xmove;

   ctx->Current.RasterPos[1] += ymove;

}

void

_mesa_init_drawpix_dispatch(struct _glapi_table *disp)

{

   SET_Bitmap(disp, _mesa_Bitmap);

   SET_CopyPixels(disp, _mesa_CopyPixels);

   SET_DrawPixels(disp, _mesa_DrawPixels);

}

#endif /* FEATURE_drawpix */