/* $Id: drawpix.c,v 1.55 2001/06/26 01:32:48 brianp Exp $ */ /* * Mesa 3-D graphics library * Version: 3.5 * * Copyright (C) 1999-2001 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. */ #ifdef PC_HEADER #include "all.h" #else #include "glheader.h" #include "colormac.h" #include "context.h" #include "drawpix.h" #include "feedback.h" #include "macros.h" #include "mem.h" #include "mmath.h" #include "state.h" #include "mtypes.h" #endif /* * Execute glDrawPixels */ void _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->RenderMode==GL_RENDER) { GLint x, y; if (!pixels || !ctx->Current.RasterPosValid) { return; } if (ctx->NewState) { _mesa_update_state(ctx); } #if 1 x = IROUND(ctx->Current.RasterPos[0]); y = IROUND(ctx->Current.RasterPos[1]); #else x = IFLOOR(ctx->Current.RasterPos[0]); y = IFLOOR(ctx->Current.RasterPos[1]); #endif ctx->OcclusionResult = GL_TRUE; ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type, &ctx->Unpack, pixels); } else if (ctx->RenderMode==GL_FEEDBACK) { if (ctx->Current.RasterPosValid) { GLfloat texcoord[4], invq; FLUSH_CURRENT(ctx, 0); invq = 1.0F / ctx->Current.Texcoord[0][3]; texcoord[0] = ctx->Current.Texcoord[0][0] * invq; texcoord[1] = ctx->Current.Texcoord[0][1] * invq; texcoord[2] = ctx->Current.Texcoord[0][2] * invq; texcoord[3] = ctx->Current.Texcoord[0][3]; FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN ); _mesa_feedback_vertex( ctx, ctx->Current.RasterPos, ctx->Current.Color, ctx->Current.Index, texcoord ); } } else if (ctx->RenderMode==GL_SELECT) { if (ctx->Current.RasterPosValid) { _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); } } } void _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 (!pixels) { _mesa_error( ctx, GL_INVALID_VALUE, "glReadPixels(pixels)" ); return; } if (ctx->NewState) _mesa_update_state(ctx); ctx->Driver.ReadPixels(ctx, x, y, width, height, format, type, &ctx->Pack, pixels); } void _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 (width < 0 || height < 0) { _mesa_error( ctx, GL_INVALID_VALUE, "glCopyPixels" ); return; } if (ctx->NewState) { _mesa_update_state(ctx); } if (ctx->RenderMode==GL_RENDER) { /* Destination of copy: */ if (!ctx->Current.RasterPosValid) { return; } #if 1 destx = IROUND(ctx->Current.RasterPos[0]); desty = IROUND(ctx->Current.RasterPos[1]); #else destx = IFLOOR(ctx->Current.RasterPos[0]); desty = IFLOOR(ctx->Current.RasterPos[1]); #endif ctx->OcclusionResult = GL_TRUE; ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty, type ); } else if (ctx->RenderMode == GL_FEEDBACK) { FLUSH_CURRENT( ctx, 0 ); FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN ); _mesa_feedback_vertex( ctx, ctx->Current.RasterPos, ctx->Current.Color, ctx->Current.Index, ctx->Current.Texcoord[0] ); } else if (ctx->RenderMode == GL_SELECT) { _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); } } void _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); /* Error checking */ if (width < 0 || height < 0) { _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap" ); return; } if (ctx->Current.RasterPosValid == GL_FALSE) { return; /* do nothing */ } if (ctx->RenderMode==GL_RENDER) { if (bitmap) { #if 0 GLint x = (GLint) ( (ctx->Current.RasterPos[0] - xorig) + 0.0F ); GLint y = (GLint) ( (ctx->Current.RasterPos[1] - yorig) + 0.0F ); #else GLint x = IFLOOR(ctx->Current.RasterPos[0] - xorig); GLint y = IFLOOR(ctx->Current.RasterPos[1] - yorig); #endif if (ctx->NewState) { _mesa_update_state(ctx); } ctx->OcclusionResult = GL_TRUE; ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap ); } } else if (ctx->RenderMode==GL_FEEDBACK) { GLfloat color[4], texcoord[4], invq; color[0] = ctx->Current.RasterColor[0]; color[1] = ctx->Current.RasterColor[1]; color[2] = ctx->Current.RasterColor[2]; color[3] = ctx->Current.RasterColor[3]; if (ctx->Current.Texcoord[0][3] == 0.0) invq = 1.0F; else invq = 1.0F / ctx->Current.RasterTexCoord[3]; texcoord[0] = ctx->Current.RasterTexCoord[0] * invq; texcoord[1] = ctx->Current.RasterTexCoord[1] * invq; texcoord[2] = ctx->Current.RasterTexCoord[2] * invq; texcoord[3] = ctx->Current.RasterTexCoord[3]; FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN ); _mesa_feedback_vertex( ctx, ctx->Current.RasterPos, color, ctx->Current.RasterIndex, texcoord ); } else if (ctx->RenderMode==GL_SELECT) { /* Bitmaps don't generate selection hits. See appendix B of 1.1 spec. */ } /* update raster position */ ctx->Current.RasterPos[0] += xmove; ctx->Current.RasterPos[1] += ymove; }