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Diffstat (limited to 'src/mesa/main/drawpix.c')
-rw-r--r--src/mesa/main/drawpix.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c
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+/*
+ * 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
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