GUIslice_drv_sdl.h

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#ifndef _GUISLICE_DRV_SDL_H_
#define _GUISLICE_DRV_SDL_H_

// =======================================================================
// GUIslice library (driver layer for SDL 1.2 & 2.0)
// - Calvin Hass
// - https://www.impulseadventure.com/elec/guislice-gui.html
// - https://github.com/ImpulseAdventure/GUIslice
// =======================================================================
//
// The MIT License
//
// Copyright 2016-2020 Calvin Hass
//
// 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS 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.
//
// =======================================================================


// =======================================================================
// Driver Layer for SDL
// =======================================================================

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

#include "GUIslice.h"

#include <stdio.h>

#if defined(DRV_DISP_SDL1)
  #include <SDL/SDL.h>
  #include <SDL/SDL_getenv.h>
  #include <SDL/SDL_ttf.h>
#endif
#if defined(DRV_DISP_SDL2)
  #include <SDL2/SDL.h>
  #include <SDL2/SDL_ttf.h>
#endif

// Includes for optional tslib touch handling
#if defined(DRV_TOUCH_TSLIB)
  #include "tslib.h"
#endif

// =======================================================================
// API support definitions
// - These defines indicate whether the driver includes optimized
//   support for various APIs. If a define is set to 0, then the
//   GUIslice core emulation will be used instead.
// - At the very minimum, the point draw routine must be available:
//   gslc_DrvDrawPoint()
// =======================================================================

#define DRV_HAS_DRAW_POINT          1 

#if defined(DRV_DISP_SDL1)
  #define DRV_HAS_DRAW_POINTS            1 
  #define DRV_HAS_DRAW_LINE              0 
  #define DRV_HAS_DRAW_RECT_FRAME        0 
  #define DRV_HAS_DRAW_RECT_FILL         1 
  #define DRV_HAS_DRAW_RECT_ROUND_FRAME  0 
  #define DRV_HAS_DRAW_RECT_ROUND_FILL   0 
  #define DRV_HAS_DRAW_CIRCLE_FRAME      0 
  #define DRV_HAS_DRAW_CIRCLE_FILL       0 
  #define DRV_HAS_DRAW_TRI_FRAME         0 
  #define DRV_HAS_DRAW_TRI_FILL          0 
  #define DRV_HAS_DRAW_TEXT              1 
  #define DRV_HAS_DRAW_BMP_MEM           0 
#endif

#if defined(DRV_DISP_SDL2)
  #define DRV_HAS_DRAW_POINTS            1 
  #define DRV_HAS_DRAW_LINE              1 
  #define DRV_HAS_DRAW_RECT_FRAME        1 
  #define DRV_HAS_DRAW_RECT_FILL         1 
  #define DRV_HAS_DRAW_RECT_ROUND_FRAME  0 
  #define DRV_HAS_DRAW_RECT_ROUND_FILL   0 
  #define DRV_HAS_DRAW_CIRCLE_FRAME      0 
  #define DRV_HAS_DRAW_CIRCLE_FILL       0 
  #define DRV_HAS_DRAW_TRI_FRAME         0 
  #define DRV_HAS_DRAW_TRI_FILL          0 
  #define DRV_HAS_DRAW_TEXT              1 
  #define DRV_HAS_DRAW_BMP_MEM           0 
#endif

#define DRV_OVERRIDE_TXT_ALIGN      0 

// =======================================================================
// Driver-specific members
// =======================================================================
typedef struct {

  #if defined(DRV_DISP_SDL1)
  SDL_Surface*        pSurfScreen;      
  #endif

  #if defined(DRV_DISP_SDL2)
  SDL_Window*         pWind;            
  SDL_Renderer*       pRender;          
  #endif

  #if defined(DRV_TOUCH_TSLIB)
  struct tsdev*       pTsDev;           
  #endif

  gslc_tsRect         rClipRect;        

} gslc_tsDriver;



// =======================================================================
// Public APIs to GUIslice core library
// - These functions define the renderer / driver-dependent
//   implementations for the core drawing operations within
//   GUIslice.
// =======================================================================


// -----------------------------------------------------------------------
// Configuration Functions
// -----------------------------------------------------------------------

bool gslc_DrvInit(gslc_tsGui* pGui);


void gslc_DrvDestruct(gslc_tsGui* pGui);


const char* gslc_DrvGetNameDisp(gslc_tsGui* pGui);


const char* gslc_DrvGetNameTouch(gslc_tsGui* pGui);

void* gslc_DrvGetDriverDisp(gslc_tsGui* pGui);

void* gslc_DrvGetDriverTouch(gslc_tsGui* pGui);


// -----------------------------------------------------------------------
// Image/surface handling Functions
// -----------------------------------------------------------------------


void* gslc_DrvLoadImage(gslc_tsGui* pGui,gslc_tsImgRef sImgRef);


bool gslc_DrvSetBkgndImage(gslc_tsGui* pGui,gslc_tsImgRef sImgRef);

bool gslc_DrvSetBkgndColor(gslc_tsGui* pGui,gslc_tsColor nCol);

bool gslc_DrvSetElemImageNorm(gslc_tsGui* pGui,gslc_tsElem* pElem,gslc_tsImgRef sImgRef);

bool gslc_DrvSetElemImageGlow(gslc_tsGui* pGui,gslc_tsElem* pElem,gslc_tsImgRef sImgRef);


void gslc_DrvImageDestruct(void* pvImg);


bool gslc_DrvSetClipRect(gslc_tsGui* pGui,gslc_tsRect* pRect);


// -----------------------------------------------------------------------
// Font handling Functions
// -----------------------------------------------------------------------


const void* gslc_DrvFontAdd(gslc_teFontRefType eFontRefType,const void* pvFontRef,uint16_t nFontSz);

void gslc_DrvFontsDestruct(gslc_tsGui* pGui);


bool gslc_DrvGetTxtSize(gslc_tsGui* pGui,gslc_tsFont* pFont,const char* pStr,gslc_teTxtFlags eTxtFlags,
        int16_t* pnTxtX,int16_t* pnTxtY,uint16_t* pnTxtSzW,uint16_t* pnTxtSzH);


bool gslc_DrvDrawTxt(gslc_tsGui* pGui,int16_t nTxtX,int16_t nTxtY,gslc_tsFont* pFont,const char* pStr,gslc_teTxtFlags eTxtFlags,gslc_tsColor colTxt,gslc_tsColor colBg);


// -----------------------------------------------------------------------
// Screen Management Functions
// -----------------------------------------------------------------------

void gslc_DrvPageFlipNow(gslc_tsGui* pGui);


// -----------------------------------------------------------------------
// Graphics Primitives Functions
// -----------------------------------------------------------------------

bool gslc_DrvDrawPoint(gslc_tsGui* pGui,int16_t nX,int16_t nY,gslc_tsColor nCol);

bool gslc_DrvDrawPoints(gslc_tsGui* pGui,gslc_tsPt* asPt,uint16_t nNumPt,gslc_tsColor nCol);

bool gslc_DrvDrawFrameRect(gslc_tsGui* pGui,gslc_tsRect rRect,gslc_tsColor nCol);


bool gslc_DrvDrawFillRect(gslc_tsGui* pGui,gslc_tsRect rRect,gslc_tsColor nCol);


bool gslc_DrvDrawLine(gslc_tsGui* pGui,int16_t nX0,int16_t nY0,int16_t nX1,int16_t nY1,gslc_tsColor nCol);


// TODO: Add DrvDrawFrameCircle()
// TODO: Add DrvDrawFillCircle()
// TODO: Add DrvDrawFrameTriangle()
// TODO: Add DrvDrawFillTriangle()


bool gslc_DrvDrawImage(gslc_tsGui* pGui,int16_t nDstX,int16_t nDstY,gslc_tsImgRef sImgRef);


// TODO: Add DrvDrawMonoFromMem()
// TODO: Add DrvDrawBmp24FromMem()


void gslc_DrvDrawBkgnd(gslc_tsGui* pGui);


// -----------------------------------------------------------------------
// Touch Functions
// -----------------------------------------------------------------------

bool gslc_DrvGetTouch(gslc_tsGui* pGui,int16_t* pnX,int16_t* pnY,uint16_t* pnPress,gslc_teInputRawEvent* peInputEvent,int16_t* pnInputVal);


// -----------------------------------------------------------------------
// Dynamic Screen rotation and Touch axes swap/flip functions
// -----------------------------------------------------------------------

bool gslc_DrvRotate(gslc_tsGui* pGui, uint8_t nRotation);


// =======================================================================
// Private Functions
// - These functions are not included in the scope of APIs used by
//   the core GUIslice library. Instead, these functions are used
//   to support the operations within this driver layer.
// =======================================================================

// -----------------------------------------------------------------------
// Private Configuration Functions
// -----------------------------------------------------------------------

bool gslc_DrvCleanStart(const char* sTTY);


void gslc_DrvReportInfoPre();

void gslc_DrvReportInfoPost();

// -----------------------------------------------------------------------
// Private Conversion Functions
// -----------------------------------------------------------------------

SDL_Rect  gslc_DrvAdaptRect(gslc_tsRect rRect);

SDL_Color  gslc_DrvAdaptColor(gslc_tsColor sCol);


// -----------------------------------------------------------------------
// Private Drawing Functions
// -----------------------------------------------------------------------

#if defined(DRV_DISP_SDL1)
bool gslc_DrvScreenLock(gslc_tsGui* pGui);


void gslc_DrvScreenUnlock(gslc_tsGui* pGui);


uint32_t gslc_DrvAdaptColorRaw(gslc_tsGui* pGui,gslc_tsColor nCol);


uint32_t gslc_DrvDrawGetPixelRaw(gslc_tsGui* pGui,int16_t nX,int16_t nY);


void gslc_DrvDrawSetPixelRaw(gslc_tsGui* pGui,int16_t nX,int16_t nY,uint32_t nPixelCol);

void gslc_DrvPasteSurface(gslc_tsGui* pGui,int16_t nX, int16_t nY, void* pvSrc, void* pvDest);

#endif // DRV_DISP_SDL1



// -----------------------------------------------------------------------
// Private Touchscreen Functions (if using SDL)
// -----------------------------------------------------------------------

bool gslc_DrvInitTouch(gslc_tsGui* pGui,const char* acDev);


// -----------------------------------------------------------------------
// Touchscreen Functions (if using tslib)
// -----------------------------------------------------------------------

#if defined(DRV_TOUCH_TSLIB)
bool gslc_TDrvInitTouch(gslc_tsGui* pGui,const char* acDev);


bool gslc_TDrvGetTouch(gslc_tsGui* pGui, int16_t* pnX, int16_t* pnY, uint16_t* pnPress, gslc_teInputRawEvent* peInputEvent, int16_t* pnInputVal);

#endif // DRV_TOUCH_TSLIB


#ifdef __cplusplus
}
#endif // __cplusplus
#endif // _GUISLICE_DRV_SDL_H_