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/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) shall be included in all copies or substantial portionsalloc
* 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 "main/glheader.h"
#include "main/enums.h"
#include "main/image.h"
#include "main/mtypes.h"
#include "main/macros.h"
#include "main/bufferobj.h"
#include "main/teximage.h"
#include "main/texenv.h"
#include "main/texobj.h"
#include "main/texstate.h"
#include "main/texparam.h"
#include "main/matrix.h"
#include "main/varray.h"
#include "main/attrib.h"
#include "main/enable.h"
#include "glapi/dispatch.h"
#include "swrast/swrast.h"
#include "intel_screen.h"
#include "intel_context.h"
#include "intel_batchbuffer.h"
#include "intel_blit.h"
#include "intel_buffers.h"
#include "intel_regions.h"
#include "intel_pixel.h"
#include "intel_buffer_objects.h"
#include "intel_tris.h"
static GLboolean
intel_texture_drawpixels(GLcontext * ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format,
GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
GLuint texname;
GLfloat vertices[4][4];
GLfloat texcoords[4][2];
/* We're going to mess with texturing with no regard to existing texture
* state, so if there is some set up we have to bail.
*/
if (ctx->Texture._EnabledUnits != 0)
return GL_FALSE;
/* Can't do textured DrawPixels with a fragment program, unless we were
* to generate a new program that sampled our texture and put the results
* in the fragment color before the user's program started.
*/
if (ctx->FragmentProgram.Enabled)
return GL_FALSE;
/* Don't even want to think about it */
if (format == GL_COLOR_INDEX)
return GL_FALSE;
/* We don't have a way to generate fragments with stencil values which *
* will set the resulting stencil value.
*/
if (format == GL_STENCIL_INDEX)
return GL_FALSE;
/* To do DEPTH_COMPONENT, we would need to change our setup to not draw to
* the color buffer, and sample the texture values into the fragment depth
* in a program.
*/
if (format == GL_DEPTH_COMPONENT)
return GL_FALSE;
_mesa_PushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT | GL_TEXTURE_BIT |
GL_CURRENT_BIT);
_mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
/* XXX: pixel store stuff */
_mesa_Disable(GL_POLYGON_STIPPLE);
_mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
_mesa_Enable(GL_TEXTURE_2D);
_mesa_GenTextures(1, &texname);
_mesa_BindTexture(GL_TEXTURE_2D, texname);
_mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
_mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
_mesa_TexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
/*
_mesa_TexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE);
_mesa_TexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
*/
_mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, format,
type, pixels);
_mesa_MatrixMode(GL_PROJECTION);
_mesa_PushMatrix();
_mesa_LoadIdentity();
_mesa_Ortho(0, ctx->DrawBuffer->Width, 0, ctx->DrawBuffer->Height, 1, -1);
_mesa_MatrixMode(GL_MODELVIEW);
_mesa_PushMatrix();
_mesa_LoadIdentity();
vertices[0][0] = x;
vertices[0][1] = y;
vertices[0][2] = ctx->Current.RasterPos[2];
vertices[0][3] = ctx->Current.RasterPos[3];
vertices[1][0] = x + width * ctx->Pixel.ZoomX;
vertices[1][1] = y;
vertices[1][2] = ctx->Current.RasterPos[2];
vertices[1][3] = ctx->Current.RasterPos[3];
vertices[2][0] = x + width * ctx->Pixel.ZoomX;
vertices[2][1] = y + height * ctx->Pixel.ZoomY;
vertices[2][2] = ctx->Current.RasterPos[2];
vertices[2][3] = ctx->Current.RasterPos[3];
vertices[3][0] = x;
vertices[3][1] = y + height * ctx->Pixel.ZoomY;
vertices[3][2] = ctx->Current.RasterPos[2];
vertices[3][3] = ctx->Current.RasterPos[3];
texcoords[0][0] = 0.0;
texcoords[0][1] = 0.0;
texcoords[1][0] = 1.0;
texcoords[1][1] = 0.0;
texcoords[2][0] = 1.0;
texcoords[2][1] = 1.0;
texcoords[3][0] = 0.0;
texcoords[3][1] = 1.0;
_mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
_mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
_mesa_Enable(GL_VERTEX_ARRAY);
_mesa_Enable(GL_TEXTURE_COORD_ARRAY);
CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
_mesa_MatrixMode(GL_PROJECTION);
_mesa_PopMatrix();
_mesa_MatrixMode(GL_MODELVIEW);
_mesa_PopMatrix();
_mesa_PopClientAttrib();
_mesa_PopAttrib();
_mesa_DeleteTextures(1, &texname);
return GL_TRUE;
}
void
intelDrawPixels(GLcontext * ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format,
GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid * pixels)
{
if (intel_texture_drawpixels(ctx, x, y, width, height, format, type,
unpack, pixels))
return;
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
if (ctx->FragmentProgram._Current == ctx->FragmentProgram._TexEnvProgram) {
/*
* We don't want the i915 texenv program to be applied to DrawPixels.
* This is really just a performance optimization (mesa will other-
* wise happily run the fragment program on each pixel in the image).
*/
struct gl_fragment_program *fpSave = ctx->FragmentProgram._Current;
/* can't just set current frag prog to 0 here as on buffer resize
we'll get new state checks which will segfault. Remains a hack. */
ctx->FragmentProgram._Current = NULL;
ctx->FragmentProgram._UseTexEnvProgram = GL_FALSE;
ctx->FragmentProgram._Active = GL_FALSE;
_swrast_DrawPixels( ctx, x, y, width, height, format, type,
unpack, pixels );
ctx->FragmentProgram._Current = fpSave;
ctx->FragmentProgram._UseTexEnvProgram = GL_TRUE;
ctx->FragmentProgram._Active = GL_TRUE;
_swrast_InvalidateState(ctx, _NEW_PROGRAM);
}
else {
_swrast_DrawPixels( ctx, x, y, width, height, format, type,
unpack, pixels );
}
}
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