diff options
Diffstat (limited to 'src/render.c')
| -rw-r--r-- | src/render.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/render.c b/src/render.c new file mode 100644 index 0000000..d2d747e --- /dev/null +++ b/src/render.c @@ -0,0 +1,226 @@ +/**************************************************************************** + * Functions to render icons using the XRender extension. + * Copyright (C) 2005 Joe Wingbermuehle + ****************************************************************************/ + +#include "jwm.h" +#include "render.h" +#include "icon.h" +#include "image.h" +#include "main.h" +#include "color.h" +#include "error.h" + +#ifdef USE_XRENDER +static int haveRender = 0; +#endif + +/**************************************************************************** + ****************************************************************************/ +void QueryRenderExtension() +{ + +#ifdef USE_XRENDER + int event, error; + Bool rc; + + rc = JXRenderQueryExtension(display, &event, &error); + if(rc == True) { + haveRender = 1; + Debug("render extension enabled"); + } else { + haveRender = 0; + Debug("render extension disabled"); + } + + if(haveRender && rootDepth < 24) { + Warning("color depth is %d, disabling icon alpha channel", rootDepth); + haveRender = 0; + } + +#endif + +} + +/**************************************************************************** + ****************************************************************************/ +int PutScaledRenderIcon(IconNode *icon, ScaledIconNode *node, Drawable d, + int x, int y) +{ + +#ifdef USE_XRENDER + + Picture dest; + Picture source; + XRenderPictFormat *fp; + int width, height; + + Assert(icon); + + if(!haveRender) { + return 0; + } + + source = node->imagePicture; + if(source != None) { + + fp = JXRenderFindVisualFormat(display, rootVisual); + Assert(fp); + + dest = JXRenderCreatePicture(display, d, fp, 0, NULL); + + if(node->width == 0) { + width = icon->image->width; + } else { + width = node->width; + } + if(node->height == 0) { + height = icon->image->height; + } else { + height = node->height; + } + + JXRenderComposite(display, PictOpOver, source, None, dest, + 0, 0, 0, 0, x, y, width, height); + + JXRenderFreePicture(display, dest); + + } + + return 1; + +#else + + return 0; + +#endif + +} + +/**************************************************************************** + ****************************************************************************/ +ScaledIconNode *CreateScaledRenderIcon(IconNode *icon, + int width, int height) { + + ScaledIconNode *result = NULL; + +#ifdef USE_XRENDER + + XRenderPictureAttributes picAttributes; + XRenderPictFormat picFormat; + XRenderPictFormat *fp; + XColor color; + GC maskGC; + XImage *destImage; + XImage *destMask; + unsigned long alpha; + int index; + int x, y; + double scalex, scaley; + double srcx, srcy; + int imageLine; + int maskLine; + + Assert(icon); + + if(!haveRender) { + return NULL; + } + + result = Allocate(sizeof(ScaledIconNode)); + result->next = icon->nodes; + icon->nodes = result; + + if(width == 0) { + width = icon->image->width; + } + if(height == 0) { + height = icon->image->height; + } + result->width = width; + result->height = height; + + scalex = (double)icon->image->width / width; + scaley = (double)icon->image->height / height; + + result->mask = JXCreatePixmap(display, rootWindow, width, height, 8); + maskGC = JXCreateGC(display, result->mask, 0, NULL); + result->image = JXCreatePixmap(display, rootWindow, + width, height, rootDepth); + + destImage = JXCreateImage(display, rootVisual, rootDepth, ZPixmap, 0, + NULL, width, height, 8, 0); + destImage->data = Allocate(sizeof(unsigned long) * width * height); + + destMask = JXCreateImage(display, rootVisual, 8, ZPixmap, 0, + NULL, width, height, 8, 0); + destMask->data = Allocate(width * height); + + imageLine = 0; + maskLine = 0; + srcy = 0.0; + for(y = 0; y < height; y++) { + srcx = 0.0; + for(x = 0; x < width; x++) { + + index = (int)srcy * icon->image->width + (int)srcx; + alpha = (icon->image->data[index] >> 24) & 0xFFUL; + color.red = ((icon->image->data[index] >> 16) & 0xFFUL) * 257; + color.green = ((icon->image->data[index] >> 8) & 0xFFUL) * 257; + color.blue = (icon->image->data[index] & 0xFFUL) * 257; + + GetColor(&color); + XPutPixel(destImage, x, y, color.pixel); + destMask->data[maskLine + x] = alpha * 257; + + srcx += scalex; + + } + srcy += scaley; + imageLine += destImage->bytes_per_line; + maskLine += destMask->bytes_per_line; + } + + /* Render the image data to the image pixmap. */ + JXPutImage(display, result->image, rootGC, destImage, 0, 0, 0, 0, + width, height); + Release(destImage->data); + destImage->data = NULL; + JXDestroyImage(destImage); + + /* Render the alpha data to the mask pixmap. */ + JXPutImage(display, result->mask, maskGC, destMask, 0, 0, 0, 0, + width, height); + Release(destMask->data); + destMask->data = NULL; + JXDestroyImage(destMask); + JXFreeGC(display, maskGC); + + /* Create the render picture. */ + picFormat.type = PictTypeDirect; + picFormat.depth = 8; + picFormat.direct.alphaMask = 0xFF; + fp = JXRenderFindFormat(display, + PictFormatType | PictFormatDepth | PictFormatAlphaMask, + &picFormat, 0); + Assert(fp); + result->maskPicture = JXRenderCreatePicture(display, result->mask, + fp, 0, NULL); + picAttributes.alpha_map = result->maskPicture; + fp = JXRenderFindVisualFormat(display, rootVisual); + Assert(fp); + result->imagePicture = JXRenderCreatePicture(display, result->image, + fp, CPAlphaMap, &picAttributes); + + /* Free unneeded pixmaps. */ + JXFreePixmap(display, result->image); + result->image = None; + JXFreePixmap(display, result->mask); + result->mask = None; + +#endif + + return result; + +} + |