src/mesa/drivers/dri/intel/intel_pixel_copy.c - fp2-dev/platform/external/mesa3d - Gitiles

 /**************************************************************************
  *
  * 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 "drivers/common/meta.h"

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

 #define FILE_DEBUG_FLAG DEBUG_PIXEL

 static struct intel_region *
 copypix_src_region(struct intel_context *intel, GLenum type)
 {
    switch (type) {
    case GL_COLOR:
       return intel_readbuf_region(intel);
    case GL_DEPTH:
       /* Don't think this is really possible execpt at 16bpp, when we have no stencil.
        */
       if (intel->depth_region && intel->depth_region->cpp == 2)
          return intel->depth_region;
    case GL_STENCIL:
       /* Don't think this is really possible.
        */
       break;
    case GL_DEPTH_STENCIL_EXT:
       /* Does it matter whether it is stencil/depth or depth/stencil?
        */
       return intel->depth_region;
    default:
       break;
    }

    return NULL;
 }


 /**
  * 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 GLboolean
 intel_check_copypixel_blit_fragment_ops(GLcontext * 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] ||
             !ctx->Color.ColorMask[1] ||
             !ctx->Color.ColorMask[2] ||
             !ctx->Color.ColorMask[3] ||
             ctx->Texture._EnabledUnits ||
 	    ctx->FragmentProgram._Enabled ||
 	    ctx->Color.BlendEnabled);
 }


 /**
  * CopyPixels with the blitter.  Don't support zooming, pixel transfer, etc.
  */
 static GLboolean
 do_blit_copypixels(GLcontext * ctx,
                    GLint srcx, GLint srcy,
                    GLsizei width, GLsizei height,
                    GLint dstx, GLint dsty, GLenum type)
 {
    struct intel_context *intel = intel_context(ctx);
    struct intel_region *dst = intel_drawbuf_region(intel);
    struct intel_region *src = copypix_src_region(intel, type);
    struct gl_framebuffer *fb = ctx->DrawBuffer;
    struct gl_framebuffer *read_fb = ctx->ReadBuffer;
    unsigned int num_cliprects;
    drm_clip_rect_t *cliprects;
    int x_off, y_off;

    if (type == GL_DEPTH || type == GL_STENCIL) {
       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 	 fprintf(stderr, "glCopyPixels() fallback: GL_DEPTH || GL_STENCIL\n");
       return GL_FALSE;
    }

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

    /* 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 GL_FALSE;

    if (!src || !dst)
       return GL_FALSE;


    intelFlush(&intel->ctx);

    LOCK_HARDWARE(intel);

    intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
    if (num_cliprects != 0) {
       GLint delta_x;
       GLint delta_y;
       GLint orig_dstx;
       GLint orig_dsty;
       GLint orig_srcx;
       GLint orig_srcy;
       GLuint i;

       /* XXX: We fail to handle different inversion between read and draw framebuffer. */

       /* 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;

       /* Convert from GL to hardware coordinates:
        */
       if (fb->Name == 0) {
 	 /* copypixels to a system framebuffer */
 	 dstx = x_off + dstx;
 	 dsty = y_off + (fb->Height - dsty - height);
       } else {
 	 /* copypixels to a user framebuffer object */
 	 dstx = x_off + dstx;
 	 dsty = y_off + dsty;
       }

       /* Flip source Y if it's a system framebuffer. */
       if (read_fb->Name == 0) {
 	 srcx = intel->driReadDrawable->x + srcx;
 	 srcy = intel->driReadDrawable->y + (fb->Height - srcy - height);
       }

       delta_x = srcx - dstx;
       delta_y = srcy - dsty;
       /* Could do slightly more clipping: Eg, take the intersection of
        * the destination cliprects and the read drawable cliprects
        *
        * This code will not overwrite other windows, but will
        * introduce garbage when copying from obscured window regions.
        */
       for (i = 0; i < num_cliprects; i++) {
 	 GLint clip_x = dstx;
 	 GLint clip_y = dsty;
 	 GLint clip_w = width;
 	 GLint clip_h = height;

          if (!_mesa_clip_to_region(cliprects[i].x1, cliprects[i].y1,
 				   cliprects[i].x2, cliprects[i].y2,
 				   &clip_x, &clip_y, &clip_w, &clip_h))
             continue;

 	 if (!intel_region_copy(intel,
 				dst, 0, clip_x, clip_y,
 				src, 0, clip_x + delta_x, clip_y + delta_y,
 				clip_w, clip_h,
 				ctx->Color.ColorLogicOpEnabled ?
 				ctx->Color.LogicOp : GL_COPY)) {
 	    DBG("%s: blit failure\n", __FUNCTION__);
 	    UNLOCK_HARDWARE(intel);
 	    return GL_FALSE;
 	 }
       }
    }
 out:
    UNLOCK_HARDWARE(intel);

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


 void
 intelCopyPixels(GLcontext * ctx,
                 GLint srcx, GLint srcy,
                 GLsizei width, GLsizei height,
                 GLint destx, GLint desty, GLenum type)
 {
    if (INTEL_DEBUG & DEBUG_PIXEL)
       fprintf(stderr, "%s\n", __FUNCTION__);

    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 "drivers/common/meta.h"

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

	#define FILE_DEBUG_FLAG DEBUG_PIXEL

	static struct intel_region *
	copypix_src_region(struct intel_context *intel, GLenum type)
	{
	switch (type) {
	case GL_COLOR:
	return intel_readbuf_region(intel);
	case GL_DEPTH:
	/* Don't think this is really possible execpt at 16bpp, when we have no stencil.
	*/
	if (intel->depth_region && intel->depth_region->cpp == 2)
	return intel->depth_region;
	case GL_STENCIL:
	/* Don't think this is really possible.
	*/
	break;
	case GL_DEPTH_STENCIL_EXT:
	/* Does it matter whether it is stencil/depth or depth/stencil?
	*/
	return intel->depth_region;
	default:
	break;
	}

	return NULL;
	}


	/**
	* 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 GLboolean
	intel_check_copypixel_blit_fragment_ops(GLcontext * 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] \|\|
	!ctx->Color.ColorMask[1] \|\|
	!ctx->Color.ColorMask[2] \|\|
	!ctx->Color.ColorMask[3] \|\|
	ctx->Texture._EnabledUnits \|\|
	ctx->FragmentProgram._Enabled \|\|
	ctx->Color.BlendEnabled);
	}


	/**
	* CopyPixels with the blitter. Don't support zooming, pixel transfer, etc.
	*/
	static GLboolean
	do_blit_copypixels(GLcontext * ctx,
	GLint srcx, GLint srcy,
	GLsizei width, GLsizei height,
	GLint dstx, GLint dsty, GLenum type)
	{
	struct intel_context *intel = intel_context(ctx);
	struct intel_region *dst = intel_drawbuf_region(intel);
	struct intel_region *src = copypix_src_region(intel, type);
	struct gl_framebuffer *fb = ctx->DrawBuffer;
	struct gl_framebuffer *read_fb = ctx->ReadBuffer;
	unsigned int num_cliprects;
	drm_clip_rect_t *cliprects;
	int x_off, y_off;

	if (type == GL_DEPTH \|\| type == GL_STENCIL) {
	if (INTEL_DEBUG & DEBUG_FALLBACKS)
	fprintf(stderr, "glCopyPixels() fallback: GL_DEPTH \|\| GL_STENCIL\n");
	return GL_FALSE;
	}

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

	/* 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 GL_FALSE;

	if (!src \|\| !dst)
	return GL_FALSE;



	intelFlush(&intel->ctx);

	LOCK_HARDWARE(intel);

	intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
	if (num_cliprects != 0) {
	GLint delta_x;
	GLint delta_y;
	GLint orig_dstx;
	GLint orig_dsty;
	GLint orig_srcx;
	GLint orig_srcy;
	GLuint i;

	/* XXX: We fail to handle different inversion between read and draw framebuffer. */

	/* 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;

	/* Convert from GL to hardware coordinates:
	*/
	if (fb->Name == 0) {
	/* copypixels to a system framebuffer */
	dstx = x_off + dstx;
	dsty = y_off + (fb->Height - dsty - height);
	} else {
	/* copypixels to a user framebuffer object */
	dstx = x_off + dstx;
	dsty = y_off + dsty;
	}

	/* Flip source Y if it's a system framebuffer. */
	if (read_fb->Name == 0) {
	srcx = intel->driReadDrawable->x + srcx;
	srcy = intel->driReadDrawable->y + (fb->Height - srcy - height);
	}

	delta_x = srcx - dstx;
	delta_y = srcy - dsty;
	/* Could do slightly more clipping: Eg, take the intersection of
	* the destination cliprects and the read drawable cliprects
	*
	* This code will not overwrite other windows, but will
	* introduce garbage when copying from obscured window regions.
	*/
	for (i = 0; i < num_cliprects; i++) {
	GLint clip_x = dstx;
	GLint clip_y = dsty;
	GLint clip_w = width;
	GLint clip_h = height;

	if (!_mesa_clip_to_region(cliprects[i].x1, cliprects[i].y1,
	cliprects[i].x2, cliprects[i].y2,
	&clip_x, &clip_y, &clip_w, &clip_h))
	continue;

	if (!intel_region_copy(intel,
	dst, 0, clip_x, clip_y,
	src, 0, clip_x + delta_x, clip_y + delta_y,
	clip_w, clip_h,
	ctx->Color.ColorLogicOpEnabled ?
	ctx->Color.LogicOp : GL_COPY)) {
	DBG("%s: blit failure\n", __FUNCTION__);
	UNLOCK_HARDWARE(intel);
	return GL_FALSE;
	}
	}
	}
	out:
	UNLOCK_HARDWARE(intel);

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


	void
	intelCopyPixels(GLcontext * ctx,
	GLint srcx, GLint srcy,
	GLsizei width, GLsizei height,
	GLint destx, GLint desty, GLenum type)
	{
	if (INTEL_DEBUG & DEBUG_PIXEL)
	fprintf(stderr, "%s\n", __FUNCTION__);

	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);
	}