src/mesa/drivers/dri/intel/intel_pixel_copy.c - platform/external/mesa3d - Git at Google

 /**************************************************************************
  *
  * Copyright 2003 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 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 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/image.h"
 #include "main/state.h"
 #include "main/mtypes.h"
 #include "main/condrender.h"
 #include "main/fbobject.h"
 #include "drivers/common/meta.h"

 #include "intel_context.h"
 #include "intel_buffers.h"
 #include "intel_mipmap_tree.h"
 #include "intel_regions.h"
 #include "intel_pixel.h"
 #include "intel_fbo.h"

 #define FILE_DEBUG_FLAG DEBUG_PIXEL

 /**
  * Check if any fragment operations are in effect which might effect
  * glCopyPixels.  Differs from intel_check_blit_fragment_ops in that
  * we allow Scissor.
  */
 static bool
 intel_check_copypixel_blit_fragment_ops(struct gl_context * ctx)
 {
    if (ctx->NewState)
       _mesa_update_state(ctx);

    /* Could do logicop with the blitter:
     */
    return !(ctx->_ImageTransferState ||
             ctx->Color.AlphaEnabled ||
             ctx->Depth.Test ||
             ctx->Fog.Enabled ||
             ctx->Stencil._Enabled ||
             !ctx->Color.ColorMask[0][0] ||
             !ctx->Color.ColorMask[0][1] ||
             !ctx->Color.ColorMask[0][2] ||
             !ctx->Color.ColorMask[0][3] ||
             ctx->Texture._EnabledUnits ||
 	    ctx->FragmentProgram._Enabled ||
 	    ctx->Color.BlendEnabled);
 }


 /**
  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
  */
 static bool
 do_blit_copypixels(struct gl_context * ctx,
                    GLint srcx, GLint srcy,
                    GLsizei width, GLsizei height,
                    GLint dstx, GLint dsty, GLenum type)
 {
    struct intel_context *intel = intel_context(ctx);
    struct gl_framebuffer *fb = ctx->DrawBuffer;
    struct gl_framebuffer *read_fb = ctx->ReadBuffer;
    GLint orig_dstx;
    GLint orig_dsty;
    GLint orig_srcx;
    GLint orig_srcy;
    bool flip = false;
    struct intel_renderbuffer *draw_irb = NULL;
    struct intel_renderbuffer *read_irb = NULL;
    gl_format read_format, draw_format;

    /* Update draw buffer bounds */
    _mesa_update_state(ctx);

    switch (type) {
    case GL_COLOR:
       if (fb->_NumColorDrawBuffers != 1) {
 	 fallback_debug("glCopyPixels() fallback: MRT\n");
 	 return false;
       }

       draw_irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
       read_irb = intel_renderbuffer(read_fb->_ColorReadBuffer);
       break;
    case GL_DEPTH_STENCIL_EXT:
       draw_irb = intel_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
       read_irb =
 	 intel_renderbuffer(read_fb->Attachment[BUFFER_DEPTH].Renderbuffer);
       break;
    case GL_DEPTH:
       fallback_debug("glCopyPixels() fallback: GL_DEPTH\n");
       return false;
    case GL_STENCIL:
       fallback_debug("glCopyPixels() fallback: GL_STENCIL\n");
       return false;
    default:
       fallback_debug("glCopyPixels(): Unknown type\n");
       return false;
    }

    if (!draw_irb) {
       fallback_debug("glCopyPixels() fallback: missing draw buffer\n");
       return false;
    }

    if (!read_irb) {
       fallback_debug("glCopyPixels() fallback: missing read buffer\n");
       return false;
    }

    read_format = intel_rb_format(read_irb);
    draw_format = intel_rb_format(draw_irb);

    if (draw_format != read_format &&
        !(draw_format == MESA_FORMAT_XRGB8888 &&
 	 read_format == MESA_FORMAT_ARGB8888)) {
       fallback_debug("glCopyPixels() fallback: mismatched formats (%s -> %s\n",
 		     _mesa_get_format_name(read_format),
                      _mesa_get_format_name(draw_format));
       return false;
    }

    /* Copypixels can be more than a straight copy.  Ensure all the
     * extra operations are disabled:
     */
    if (!intel_check_copypixel_blit_fragment_ops(ctx) ||
        ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F)
       return false;

    intel_prepare_render(intel);

    intel_flush(&intel->ctx);

    /* Clip to destination buffer. */
    orig_dstx = dstx;
    orig_dsty = dsty;
    if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
 			     fb->_Xmax, fb->_Ymax,
 			     &dstx, &dsty, &width, &height))
       goto out;
    /* Adjust src coords for our post-clipped destination origin */
    srcx += dstx - orig_dstx;
    srcy += dsty - orig_dsty;

    /* Clip to source buffer. */
    orig_srcx = srcx;
    orig_srcy = srcy;
    if (!_mesa_clip_to_region(0, 0,
 			     read_fb->Width, read_fb->Height,
 			     &srcx, &srcy, &width, &height))
       goto out;
    /* Adjust dst coords for our post-clipped source origin */
    dstx += srcx - orig_srcx;
    dsty += srcy - orig_srcy;

    /* Flip dest Y if it's a window system framebuffer. */
    if (_mesa_is_winsys_fbo(fb)) {
       /* copypixels to a window system framebuffer */
       dsty = fb->Height - dsty - height;
       flip = !flip;
    }

    /* Flip source Y if it's a window system framebuffer. */
    if (_mesa_is_winsys_fbo(read_fb)) {
       srcy = read_fb->Height - srcy - height;
       flip = !flip;
    }

    srcx += read_irb->draw_x;
    srcy += read_irb->draw_y;
    dstx += draw_irb->draw_x;
    dsty += draw_irb->draw_y;

    if (!intel_region_copy(intel,
 			  draw_irb->mt->region, 0, dstx, dsty,
 			  read_irb->mt->region, 0, srcx, srcy,
 			  width, height, flip,
 			  ctx->Color.ColorLogicOpEnabled ?
 			  ctx->Color.LogicOp : GL_COPY)) {
       DBG("%s: blit failure\n", __FUNCTION__);
       return false;
    }

 out:
    intel_check_front_buffer_rendering(intel);

    DBG("%s: success\n", __FUNCTION__);
    return true;
 }


 void
 intelCopyPixels(struct gl_context * ctx,
                 GLint srcx, GLint srcy,
                 GLsizei width, GLsizei height,
                 GLint destx, GLint desty, GLenum type)
 {
    DBG("%s\n", __FUNCTION__);

    if (!_mesa_check_conditional_render(ctx))
       return;

    if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
       return;

    /* this will use swrast if needed */
    _mesa_meta_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
 }
	/**************************************************************************
	*
	* Copyright 2003 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 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 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/image.h"
	#include "main/state.h"
	#include "main/mtypes.h"
	#include "main/condrender.h"
	#include "main/fbobject.h"
	#include "drivers/common/meta.h"

	#include "intel_context.h"
	#include "intel_buffers.h"
	#include "intel_mipmap_tree.h"
	#include "intel_regions.h"
	#include "intel_pixel.h"
	#include "intel_fbo.h"

	#define FILE_DEBUG_FLAG DEBUG_PIXEL

	/**
	* Check if any fragment operations are in effect which might effect
	* glCopyPixels. Differs from intel_check_blit_fragment_ops in that
	* we allow Scissor.
	*/
	static bool
	intel_check_copypixel_blit_fragment_ops(struct gl_context * ctx)
	{
	if (ctx->NewState)
	_mesa_update_state(ctx);

	/* Could do logicop with the blitter:
	*/
	return !(ctx->_ImageTransferState \|\|
	ctx->Color.AlphaEnabled \|\|
	ctx->Depth.Test \|\|
	ctx->Fog.Enabled \|\|
	ctx->Stencil._Enabled \|\|
	!ctx->Color.ColorMask[0][0] \|\|
	!ctx->Color.ColorMask[0][1] \|\|
	!ctx->Color.ColorMask[0][2] \|\|
	!ctx->Color.ColorMask[0][3] \|\|
	ctx->Texture._EnabledUnits \|\|
	ctx->FragmentProgram._Enabled \|\|
	ctx->Color.BlendEnabled);
	}


	/**
	* CopyPixels with the blitter. Don't support zooming, pixel transfer, etc.
	*/
	static bool
	do_blit_copypixels(struct gl_context * ctx,
	GLint srcx, GLint srcy,
	GLsizei width, GLsizei height,
	GLint dstx, GLint dsty, GLenum type)
	{
	struct intel_context *intel = intel_context(ctx);
	struct gl_framebuffer *fb = ctx->DrawBuffer;
	struct gl_framebuffer *read_fb = ctx->ReadBuffer;
	GLint orig_dstx;
	GLint orig_dsty;
	GLint orig_srcx;
	GLint orig_srcy;
	bool flip = false;
	struct intel_renderbuffer *draw_irb = NULL;
	struct intel_renderbuffer *read_irb = NULL;
	gl_format read_format, draw_format;

	/* Update draw buffer bounds */
	_mesa_update_state(ctx);

	switch (type) {
	case GL_COLOR:
	if (fb->_NumColorDrawBuffers != 1) {
	fallback_debug("glCopyPixels() fallback: MRT\n");
	return false;
	}

	draw_irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
	read_irb = intel_renderbuffer(read_fb->_ColorReadBuffer);
	break;
	case GL_DEPTH_STENCIL_EXT:
	draw_irb = intel_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
	read_irb =
	intel_renderbuffer(read_fb->Attachment[BUFFER_DEPTH].Renderbuffer);
	break;
	case GL_DEPTH:
	fallback_debug("glCopyPixels() fallback: GL_DEPTH\n");
	return false;
	case GL_STENCIL:
	fallback_debug("glCopyPixels() fallback: GL_STENCIL\n");
	return false;
	default:
	fallback_debug("glCopyPixels(): Unknown type\n");
	return false;
	}

	if (!draw_irb) {
	fallback_debug("glCopyPixels() fallback: missing draw buffer\n");
	return false;
	}

	if (!read_irb) {
	fallback_debug("glCopyPixels() fallback: missing read buffer\n");
	return false;
	}

	read_format = intel_rb_format(read_irb);
	draw_format = intel_rb_format(draw_irb);

	if (draw_format != read_format &&
	!(draw_format == MESA_FORMAT_XRGB8888 &&
	read_format == MESA_FORMAT_ARGB8888)) {
	fallback_debug("glCopyPixels() fallback: mismatched formats (%s -> %s\n",
	_mesa_get_format_name(read_format),
	_mesa_get_format_name(draw_format));
	return false;
	}

	/* Copypixels can be more than a straight copy. Ensure all the
	* extra operations are disabled:
	*/
	if (!intel_check_copypixel_blit_fragment_ops(ctx) \|\|
	ctx->Pixel.ZoomX != 1.0F \|\| ctx->Pixel.ZoomY != 1.0F)
	return false;

	intel_prepare_render(intel);

	intel_flush(&intel->ctx);

	/* Clip to destination buffer. */
	orig_dstx = dstx;
	orig_dsty = dsty;
	if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
	fb->_Xmax, fb->_Ymax,
	&dstx, &dsty, &width, &height))
	goto out;
	/* Adjust src coords for our post-clipped destination origin */
	srcx += dstx - orig_dstx;
	srcy += dsty - orig_dsty;

	/* Clip to source buffer. */
	orig_srcx = srcx;
	orig_srcy = srcy;
	if (!_mesa_clip_to_region(0, 0,
	read_fb->Width, read_fb->Height,
	&srcx, &srcy, &width, &height))
	goto out;
	/* Adjust dst coords for our post-clipped source origin */
	dstx += srcx - orig_srcx;
	dsty += srcy - orig_srcy;

	/* Flip dest Y if it's a window system framebuffer. */
	if (_mesa_is_winsys_fbo(fb)) {
	/* copypixels to a window system framebuffer */
	dsty = fb->Height - dsty - height;
	flip = !flip;
	}

	/* Flip source Y if it's a window system framebuffer. */
	if (_mesa_is_winsys_fbo(read_fb)) {
	srcy = read_fb->Height - srcy - height;
	flip = !flip;
	}

	srcx += read_irb->draw_x;
	srcy += read_irb->draw_y;
	dstx += draw_irb->draw_x;
	dsty += draw_irb->draw_y;

	if (!intel_region_copy(intel,
	draw_irb->mt->region, 0, dstx, dsty,
	read_irb->mt->region, 0, srcx, srcy,
	width, height, flip,
	ctx->Color.ColorLogicOpEnabled ?
	ctx->Color.LogicOp : GL_COPY)) {
	DBG("%s: blit failure\n", __FUNCTION__);
	return false;
	}

	out:
	intel_check_front_buffer_rendering(intel);

	DBG("%s: success\n", __FUNCTION__);
	return true;
	}


	void
	intelCopyPixels(struct gl_context * ctx,
	GLint srcx, GLint srcy,
	GLsizei width, GLsizei height,
	GLint destx, GLint desty, GLenum type)
	{
	DBG("%s\n", __FUNCTION__);

	if (!_mesa_check_conditional_render(ctx))
	return;

	if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
	return;

	/* this will use swrast if needed */
	_mesa_meta_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
	}