Initial import.

1 files changed, 298 insertions, 0 deletions

diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c
new file mode 100644
index 0000000..6f7cae9
--- /dev/null
+++ b/src/mesa/main/drawpix.c
@@ -0,0 +1,298 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.1
+ *
+ * Copyright (C) 1999-2004  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 "colormac.h"
+#include "context.h"
+#include "drawpix.h"
+#include "feedback.h"
+#include "macros.h"
+#include "state.h"
+#include "mtypes.h"
+
+
+#if _HAVE_FULL_GL
+
+/*
+ * Execute glDrawPixels
+ */
+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 (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glDrawPixels (invalid fragment program)");
+      return;
+   }
+
+   if (width < 0 || height < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
+      return;
+   }
+
+   if (ctx->RenderMode==GL_RENDER) {
+      GLint x, y;
+      if (!ctx->Current.RasterPosValid) {
+	 return;
+      }
+
+      if (ctx->NewState) {
+         _mesa_update_state(ctx);
+      }
+
+      /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
+      x = IROUND(ctx->Current.RasterPos[0]);
+      y = IROUND(ctx->Current.RasterPos[1]);
+
+      ctx->OcclusionResult = GL_TRUE;
+      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 */
+      if (ctx->Current.RasterPosValid) {
+	 FLUSH_CURRENT( ctx, 0 );
+         FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
+         _mesa_feedback_vertex( ctx,
+				ctx->Current.RasterPos,
+				ctx->Current.RasterColor,
+				ctx->Current.RasterIndex,
+				ctx->Current.RasterTexCoords[0] );
+      }
+   }
+   else if (ctx->RenderMode==GL_SELECT) {
+      if (ctx->Current.RasterPosValid) {
+         _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
+      }
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
+                  GLenum type )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint destx, desty;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glCopyPixels (invalid fragment program)");
+      return;
+   }
+
+   if (width < 0 || height < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)" );
+      return;
+   }
+
+   if (ctx->NewState) {
+      _mesa_update_state(ctx);
+   }
+
+   if (ctx->RenderMode==GL_RENDER) {
+      /* Destination of copy: */
+      if (!ctx->Current.RasterPosValid) {
+	 return;
+      }
+
+      /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
+      destx = IROUND(ctx->Current.RasterPos[0]);
+      desty = IROUND(ctx->Current.RasterPos[1]);
+
+      ctx->OcclusionResult = GL_TRUE;
+
+      ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
+			      type );
+   }
+   else if (ctx->RenderMode == GL_FEEDBACK) {
+      if (ctx->Current.RasterPosValid) {
+         FLUSH_CURRENT( ctx, 0 );
+         FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
+         _mesa_feedback_vertex( ctx, 
+                                ctx->Current.RasterPos,
+                                ctx->Current.RasterColor,
+                                ctx->Current.RasterIndex,
+                                ctx->Current.RasterTexCoords[0] );
+      }
+   }
+   else if (ctx->RenderMode == GL_SELECT) {
+      _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
+   }
+}
+
+#endif /* _HAVE_FULL_GL */
+
+
+
+void GLAPIENTRY
+_mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
+		  GLenum format, GLenum type, GLvoid *pixels )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (width < 0 || height < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE,
+                   "glReadPixels(width=%d height=%d)", width, height );
+      return;
+   }
+
+   if (ctx->NewState)
+      _mesa_update_state(ctx);
+
+   ctx->Driver.ReadPixels(ctx, x, y, width, height,
+			  format, type, &ctx->Pack, pixels);
+}
+
+
+
+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 (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBitmap (invalid fragment program)");
+      return;
+   }
+
+   if (width < 0 || height < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
+      return;
+   }
+
+   if (ctx->Current.RasterPosValid == GL_FALSE) {
+      return;    /* do nothing */
+   }
+
+   if (ctx->RenderMode==GL_RENDER) {
+      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
+      GLint x = IFLOOR(ctx->Current.RasterPos[0] - xorig);
+      GLint y = IFLOOR(ctx->Current.RasterPos[1] - yorig);
+
+      if (ctx->NewState) {
+         _mesa_update_state(ctx);
+      }
+
+      ctx->OcclusionResult = GL_TRUE;
+      ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
+   }
+#if _HAVE_FULL_GL
+   else if (ctx->RenderMode==GL_FEEDBACK) {
+      if (ctx->Current.RasterPosValid) {
+	 FLUSH_CURRENT(ctx, 0);
+         FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
+         _mesa_feedback_vertex( ctx,
+				ctx->Current.RasterPos,
+				ctx->Current.RasterColor,
+				ctx->Current.RasterIndex, 
+				ctx->Current.RasterTexCoords[0] );
+      }
+   }
+   else {
+      ASSERT(ctx->RenderMode == GL_SELECT);
+      /* Bitmaps don't generate selection hits.  See appendix B of 1.1 spec. */
+   }
+#endif
+
+   /* update raster position */
+   ctx->Current.RasterPos[0] += xmove;
+   ctx->Current.RasterPos[1] += ymove;
+}
+
+
+
+#if 0  /* experimental */
+/*
+ * Execute glDrawDepthPixelsMESA().  This function accepts both a color
+ * image and depth (Z) image.  Rasterization produces fragments with
+ * color and Z taken from these images.  This function is intended for
+ * Z-compositing.  Normally, this operation requires two glDrawPixels
+ * calls with stencil testing.
+ */
+void GLAPIENTRY
+_mesa_DrawDepthPixelsMESA( GLsizei width, GLsizei height,
+                           GLenum colorFormat, GLenum colorType,
+                           const GLvoid *colors,
+                           GLenum depthType, const GLvoid *depths )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (width < 0 || height < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE,
+                   "glDrawDepthPixelsMESA(width or height < 0" );
+      return;
+   }
+
+   if (ctx->RenderMode==GL_RENDER) {
+      GLint x, y;
+      if (!colors || !depths || !ctx->Current.RasterPosValid) {
+	 return;
+      }
+
+      if (ctx->NewState) {
+         _mesa_update_state(ctx);
+      }
+
+      /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
+      x = IROUND(ctx->Current.RasterPos[0]);
+      y = IROUND(ctx->Current.RasterPos[1]);
+
+      ctx->OcclusionResult = GL_TRUE;
+      ctx->Driver.DrawDepthPixelsMESA(ctx, x, y, width, height,
+                                      colorFormat, colorType, colors,
+                                      depthType, depths, &ctx->Unpack);
+   }
+   else if (ctx->RenderMode==GL_FEEDBACK) {
+      /* Feedback the current raster pos info */
+      if (ctx->Current.RasterPosValid) {
+	 FLUSH_CURRENT( ctx, 0 );
+         FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
+         _mesa_feedback_vertex( ctx,
+				ctx->Current.RasterPos,
+				ctx->Current.RasterColor,
+				ctx->Current.RasterIndex,
+				ctx->Current.RasterTexCoords[0] );
+      }
+   }
+   else if (ctx->RenderMode==GL_SELECT) {
+      if (ctx->Current.RasterPosValid) {
+         _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
+      }
+   }
+}
+
+#endif