mirror of
https://github.com/reactos/reactos.git
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261 lines
8.6 KiB
C
261 lines
8.6 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.1
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*
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <precomp.h>
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#if FEATURE_drawpix
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/*
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* Execute glDrawPixels
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*/
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static void GLAPIENTRY
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_mesa_DrawPixels( GLsizei width, GLsizei height,
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GLenum format, GLenum type, const GLvoid *pixels )
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{
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GET_CURRENT_CONTEXT(ctx);
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ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
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if (MESA_VERBOSE & VERBOSE_API)
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_mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
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width, height,
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_mesa_lookup_enum_by_nr(format),
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_mesa_lookup_enum_by_nr(type),
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pixels,
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_mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer),
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IROUND(ctx->Current.RasterPos[0]),
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IROUND(ctx->Current.RasterPos[1]));
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if (width < 0 || height < 0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
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return;
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}
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/* Note: this call does state validation */
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if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
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return; /* the error code was recorded */
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}
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/* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
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* GL_EXT_texture_integer. From section 3.7.4 ("Rasterization of Pixel
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* Rectangles) on page 151 of the GL 3.0 specification:
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*
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* "If format contains integer components, as shown in table 3.6, an
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* INVALID OPERATION error is generated."
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*
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* Since DrawPixels rendering would be merely undefined if not an error (due
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* to a lack of defined mapping from integer data to gl_Color fragment shader
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* input), NVIDIA's implementation also just returns this error despite
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* exposing GL_EXT_texture_integer, just return an error regardless.
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*/
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if (_mesa_is_integer_format(format)) {
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_mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
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return;
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}
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if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
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return; /* the error code was recorded */
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}
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if (ctx->RasterDiscard) {
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return;
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}
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if (!ctx->Current.RasterPosValid) {
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return; /* no-op, not an error */
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}
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if (ctx->RenderMode == GL_RENDER) {
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if (width > 0 && height > 0) {
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/* Round, to satisfy conformance tests (matches SGI's OpenGL) */
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GLint x = IROUND(ctx->Current.RasterPos[0]);
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GLint y = IROUND(ctx->Current.RasterPos[1]);
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ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
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&ctx->Unpack, pixels);
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}
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}
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else if (ctx->RenderMode == GL_FEEDBACK) {
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/* Feedback the current raster pos info */
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FLUSH_CURRENT( ctx, 0 );
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_mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
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_mesa_feedback_vertex( ctx,
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ctx->Current.RasterPos,
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ctx->Current.RasterColor,
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ctx->Current.RasterTexCoords );
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}
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else {
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ASSERT(ctx->RenderMode == GL_SELECT);
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/* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
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}
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}
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static void GLAPIENTRY
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_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
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GLenum type )
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{
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GET_CURRENT_CONTEXT(ctx);
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ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
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if (MESA_VERBOSE & VERBOSE_API)
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_mesa_debug(ctx,
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"glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
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srcx, srcy, width, height,
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_mesa_lookup_enum_by_nr(type),
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_mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
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_mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer),
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IROUND(ctx->Current.RasterPos[0]),
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IROUND(ctx->Current.RasterPos[1]));
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if (width < 0 || height < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
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return;
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}
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/* Note: more detailed 'type' checking is done by the
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* _mesa_source/dest_buffer_exists() calls below. That's where we
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* check if the stencil buffer exists, etc.
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*/
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if (type != GL_COLOR &&
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type != GL_DEPTH &&
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type != GL_STENCIL) {
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_mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
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_mesa_lookup_enum_by_nr(type));
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return;
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}
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/* Note: this call does state validation */
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if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
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return; /* the error code was recorded */
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}
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if (!_mesa_source_buffer_exists(ctx, type) ||
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!_mesa_dest_buffer_exists(ctx, type)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glCopyPixels(missing source or dest buffer)");
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return;
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}
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if (ctx->RasterDiscard) {
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return;
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}
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if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
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return; /* no-op, not an error */
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}
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if (ctx->RenderMode == GL_RENDER) {
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/* Round to satisfy conformance tests (matches SGI's OpenGL) */
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if (width > 0 && height > 0) {
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GLint destx = IROUND(ctx->Current.RasterPos[0]);
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GLint desty = IROUND(ctx->Current.RasterPos[1]);
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ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
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type );
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}
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}
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else if (ctx->RenderMode == GL_FEEDBACK) {
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FLUSH_CURRENT( ctx, 0 );
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_mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
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_mesa_feedback_vertex( ctx,
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ctx->Current.RasterPos,
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ctx->Current.RasterColor,
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ctx->Current.RasterTexCoords );
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}
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else {
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ASSERT(ctx->RenderMode == GL_SELECT);
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/* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
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}
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}
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static void GLAPIENTRY
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_mesa_Bitmap( GLsizei width, GLsizei height,
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GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
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const GLubyte *bitmap )
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{
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GET_CURRENT_CONTEXT(ctx);
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ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
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if (width < 0 || height < 0) {
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_mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
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return;
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}
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if (!ctx->Current.RasterPosValid) {
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return; /* do nothing */
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}
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/* Note: this call does state validation */
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if (!_mesa_valid_to_render(ctx, "glBitmap")) {
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/* the error code was recorded */
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return;
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}
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if (ctx->RasterDiscard)
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return;
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if (ctx->RenderMode == GL_RENDER) {
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/* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
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if (width > 0 && height > 0) {
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const GLfloat epsilon = 0.0001F;
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GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
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GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
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ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
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}
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}
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#if _HAVE_FULL_GL
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else if (ctx->RenderMode == GL_FEEDBACK) {
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FLUSH_CURRENT(ctx, 0);
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_mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
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_mesa_feedback_vertex( ctx,
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ctx->Current.RasterPos,
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ctx->Current.RasterColor,
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ctx->Current.RasterTexCoords );
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}
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else {
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ASSERT(ctx->RenderMode == GL_SELECT);
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/* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
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}
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#endif
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/* update raster position */
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ctx->Current.RasterPos[0] += xmove;
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ctx->Current.RasterPos[1] += ymove;
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}
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void
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_mesa_init_drawpix_dispatch(struct _glapi_table *disp)
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{
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SET_Bitmap(disp, _mesa_Bitmap);
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SET_CopyPixels(disp, _mesa_CopyPixels);
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SET_DrawPixels(disp, _mesa_DrawPixels);
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}
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#endif /* FEATURE_drawpix */
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