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[CHG] GRRLIB_Screen2Texture should be used for composition, NoNameNo will make a demo soon
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Crayon2000
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7 changed files with 0 additions and 306 deletions
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@ -336,66 +336,3 @@ GRRLIB_texImg* GRRLIB_LoadTextureJPG (const u8 *my_jpg) {
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GRRLIB_FlushTex( my_texture );
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return my_texture;
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}
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/**
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* Compose a layer/sprite to a canvas/textured-image.
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* Currently only performs "a-over-b (normal) alpha compositing" (opacity)
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* Ie. Light source is behind the eye, not behind the canvas!
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* @author BlueChip
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* @param xoff The x-offset within the canvas (negative values allowed)
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* @param yoff The y-offset within the canvas (negative values allowed)
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* @param layer The layer/sprite to draw
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* @param canvas The canvas/textured-image on which to draw
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* @param mode Currently unused - will be composition mode
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*/
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void GRRLIB_Compose( int xoff, int yoff, GRRLIB_texImg* layer,
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GRRLIB_texImg* canvas, GRRLIB_ComposeMode mode )
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{
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int x, y; // x & y on layer
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int cnv_x, cnv_y; // x & y on canvas
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float cnv_a, lyr_a, alpha; // Alpha of canvas & layer & result
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u32 cnv_c, lyr_c; // Colour of pixel from canvas & layer
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u32 new_r, new_g, new_b, new_a; // R, G, B & A values of result
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// Loop through the layer, one pixel at a time
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for (y = 0; y < layer->h; y++) {
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cnv_y = y + yoff; // y coord of canvas pixel to edit
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if (cnv_y < 0) continue ; // not on the canvas yet
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if (cnv_y >= canvas->h) break; // off the bottom of the canvas
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for (x = 0; x < layer->w; x++) {
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cnv_x = x + xoff; // x coord of canvas pixel to edit
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if (cnv_x < 0) continue ; // not on the canvas yet
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if (cnv_x >= canvas->h) break; // off the right of the canvas
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// Grab the working pixels from the canvas and layer
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cnv_c = GRRLIB_GetPixelFromtexImg(cnv_x, cnv_y, canvas);
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lyr_c = GRRLIB_GetPixelFromtexImg(x, y, layer);
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// Calculate alpha value as 0.0 to 1.0 in 255th's
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cnv_a = A(cnv_c) /255.0;
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lyr_a = A(lyr_c) /255.0;
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// Perform desired composition
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switch (mode) {
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default:
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case GRRLIB_COMPOSE_NORMAL :
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// Perform "a-over-b (normal) alpha compositing" (opacity)
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// http://en.wikipedia.org/wiki/Alpha_compositing
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new_a = (u32)( A(lyr_c) + (A(cnv_c) *(1.0 -lyr_a)) );
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alpha = new_a /255.0;
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new_r = ( (R(lyr_c) *lyr_a) + (R(cnv_c) *cnv_a *(1 -lyr_a)) ) /alpha;
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new_g = ( (G(lyr_c) *lyr_a) + (G(cnv_c) *cnv_a *(1 -lyr_a)) ) /alpha;
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new_b = ( (B(lyr_c) *lyr_a) + (B(cnv_c) *cnv_a *(1 -lyr_a)) ) /alpha;
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break;
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}
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// Replace the old canvas pixel with the new one
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GRRLIB_SetPixelTotexImg( cnv_x, cnv_y, canvas,
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RGBA(new_r, new_g, new_b, new_a) );
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}//for x
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}// for y
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GRRLIB_FlushTex(canvas);
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}
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@ -65,14 +65,6 @@ typedef unsigned int uint;
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//==============================================================================
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// typedefs, enumerators & structs
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//==============================================================================
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/**
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* Compositions Modes.
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*/
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typedef enum Composition_Modes {
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GRRLIB_COMPOSE_NORMAL, /**< NORMAL : a-over-b alpha composition (normal) */
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} GRRLIB_ComposeMode;
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//------------------------------------------------------------------------------
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/**
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* GRRLIB Blending Modes.
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*/
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@ -125,8 +125,5 @@ GRRLIB_texImg* GRRLIB_LoadTexture (const u8 *my_img) ;
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GRRLIB_texImg* GRRLIB_LoadTexturePNG (const u8 *my_png) ;
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GRRLIB_texImg* GRRLIB_LoadTextureJPG (const u8 *my_jpg) ;
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GRRLIB_texImg* GRRLIB_LoadTextureBMP (const u8 *my_bmp) ;
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void GRRLIB_Compose (int xoff, int yoff, GRRLIB_texImg* layer,
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GRRLIB_texImg* canvas,
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GRRLIB_ComposeMode mode) ;
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#endif // __GRRLIB_FNLIB_H__
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@ -1,76 +0,0 @@
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# Quick'n'dirty makefile [BC] v2
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ifeq ($(strip $(DEVKITPPC)),)
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$(error "Use export DEVKITPPC=<path to>devkitPPC and try again")
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endif
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ifeq ($(strip $(DEVKITPRO)),)
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$(error "Use export DEVKITPRO=<path to>devkitPRO and try again")
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endif
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APP := compose
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ELF := $(APP).elf
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DOL := $(APP).dol
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MAP := $(notdir $(ELF)).map
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LIBS := -lgrrlib -lpngu -lpng -ljpeg -lz -lfat
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LIBS += -lwiiuse
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#LIBS += -lmodplay -lasnd
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LIBS += -lbte -logc
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LIBS += -lm
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BINDIR := $(DEVKITPPC)/bin
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PREFIX := $(BINDIR)/powerpc-eabi-
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CC := $(PREFIX)gcc
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CXX := $(PREFIX)g++
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AR := $(PREFIX)ar
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AS := $(PREFIX)as
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LD := $(CC)
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OBJCOPY := $(PREFIX)objcopy
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ELF2DOL := $(BINDIR)/elf2dol
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UPLOAD := $(BINDIR)/wiiload
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OGC := $(DEVKITPRO)/libogc
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INCD := $(OGC)/include
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LIBD := $(OGC)/lib/wii
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MACHDEP := -DGEKKO -mrvl -mcpu=750 -meabi -mhard-float
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CFLAGS := -O2 -Wall $(MACHDEP) -I $(INCD)
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LDFLAGS = $(MACHDEP) -Wl,-Map,$(MAP)
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LIBPATHS := -L$(DEVKITPRO)/libogc/lib/wii
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SRC := $(shell ls *.c)
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SRCOBJ := $(patsubst %.c,%.o,$(SRC))
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RES := $(shell ls *.png)
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RESOBJ := $(patsubst %.png,%.o,$(RES))
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RESC := $(patsubst %.png,%.c,$(RES))
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RESH := $(patsubst %.png,%.h,$(RES))
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OBJ := $(RESOBJ) $(SRCOBJ)
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all : $(DOL)
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$(DOL) : $(ELF)
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@echo Converting to: $@
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@$(ELF2DOL) $< $@
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$(ELF) : $(OBJ)
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@echo Linking as: $@
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@$(CC) $^ $(LDFLAGS) $(LIBPATHS) $(LIBS) -o $@
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clean :
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rm -f $(OBJ) $(RESC) $(RESH) $(ELF) $(DOL) $(MAP)
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run : $(DOL)
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$(UPLOAD) $(DOL)
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%.o : %.c
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@echo Compiling: $<
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@$(CC) $(CFLAGS) -c $< -o $@
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.PRECIOUS : %.c
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%.c : %.png
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@echo Converting resource: $<
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@$(BINDIR)/raw2c.exe $< 2>nul
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@ -1,156 +0,0 @@
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/*------------------------------------------------------------------------------
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Copyright (c) 2009 The GRRLIB Team
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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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 THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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------------------------------------------------------------------------------*/
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//------------------------------------------------------------------------------
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// Test Harness for alpha composition functions
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// The composition function and this demo were both written by BlueChip
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/*
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PaintShopPro_X2 readings:
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| | Blue-over-Red | Red-over-Blue |
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|--------+---------------+---------------|
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| Normal | 0x2D'00'D2'D8 | 0x96'00'69'D8 |
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| | | |
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*/
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//------------------------------------------------------------------------------
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#include <stdlib.h> // exit
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#include <wiiuse/wpad.h>
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#include <grrlib.h>
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#include "red50.h"
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#include "blue70.h"
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//------------------------------------------------------------------------------
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void wscan(ir_t* ir) ;
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// Wiimote overscan (to allow the cursor to move off the dge of the screen)
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#define WOVERX (200)
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#define WOVERY (300)
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#define WMU_MAX (2) // How many wiimotes to read
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ir_t ir[WMU_MAX];
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//------------------------------------------------------------------------------
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void test_compose(void)
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{
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int redOnTop = 0; // Red square starts behind the blue one
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// Our two translucent test images
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GRRLIB_texImg* red = GRRLIB_LoadTexture(red50);
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GRRLIB_texImg* blu = GRRLIB_LoadTexture(blue70);
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// The canvas we will be composing on
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GRRLIB_texImg* cnv = GRRLIB_CreateEmptyTexture(400,400);
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// Loop until home key pressed
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do {
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// Scan the wiimotes
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wscan(ir);
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// 'A' toggles z-coord of red sqaure (on-top / behind)
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if (WPAD_ButtonsDown(0) & WPAD_BUTTON_A) redOnTop ^= 1 ;
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// Clear canvas
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GRRLIB_ClearTex(cnv);
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// Compose canvas
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if (!redOnTop)
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GRRLIB_Compose(ir[0].x-180,ir[0].y-180, red, cnv, GRRLIB_COMPOSE_NORMAL);
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GRRLIB_Compose(125,125, blu, cnv, GRRLIB_COMPOSE_NORMAL) ;
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if ( redOnTop)
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GRRLIB_Compose(ir[0].x-180,ir[0].y-180, red, cnv, GRRLIB_COMPOSE_NORMAL);
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// Paint the screen black
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GRRLIB_FillScreen(0x000000FF);
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// Draw frame
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GRRLIB_SetColorRGBA(0x808080FF);
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GRRLIB_Rectangle(38,38,404,404,false);
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GRRLIB_Rectangle(39,39,402,402,false);
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// Draw Test bar
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GRRLIB_SetColorRGBA(0xFFFFFFFF);
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GRRLIB_Rectangle(283,50,20,380, true);
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// Draw Composed Canvas
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GRRLIB_DrawImg(40,40, cnv);
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// Test card (alpha performed by Wii)
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GRRLIB_Rectangle(570,50,20,450, true);
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GRRLIB_DrawImg(450, 65, red);
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GRRLIB_DrawImg(450,165, blu);
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GRRLIB_DrawImg(450,265, red);
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// Draw it [and workaround bug in GRRLIB]
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GRRLIB_Render();
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if (rmode->viTVMode &VI_NON_INTERLACE) VIDEO_WaitVSync() ;
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} while(!(WPAD_ButtonsDown(0) & WPAD_BUTTON_HOME)); // Exit on home key
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// Free up the resources we are using to hold the canvas and layers
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GRRLIB_FreeTexture(blu);
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GRRLIB_FreeTexture(red);
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GRRLIB_FreeTexture(cnv);
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}
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//------------------------------------------------------------------------------
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void wscan(ir_t* ir)
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{
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int i;
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WPAD_ScanPads();
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for (i = 0; i < WMU_MAX; i++) {
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WPAD_IR(i, &ir[i]);
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ir->x -= WOVERX/2;
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ir->y -= WOVERY/2;
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}
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}
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//------------------------------------------------------------------------------
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int main(int argc, char** argv)
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{
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(void)argc;
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(void)argv;
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int i;
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// Init graphics subsystem
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GRRLIB_Init();
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// Init the Wiimotes
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WPAD_Init();
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for (i = 0; i < WMU_MAX; i++) {
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WPAD_SetVRes(i, rmode->fbWidth+WOVERX, rmode->xfbHeight+WOVERY);
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WPAD_SetDataFormat(i, WPAD_FMT_BTNS_ACC_IR);
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}
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// Call the demo
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test_compose();
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// Clear up memory
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GRRLIB_Exit();
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exit(0);
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}
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