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Resizing proxy renderer implementation, did not test it yet

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This commit is contained in:
pelya
2010-06-04 18:56:00 +03:00
parent 41764f0f51
commit 1b87935b70
5 changed files with 347 additions and 1 deletions
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alienblaster/project/jni/application/src/global.h
+1 -1
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@@ -56,7 +56,7 @@ int getRandValue( const int *choicesWeights, int nrChoices, int sumWeights=0 );
void initAllSurfaces();
// screen options
const int SCREEN_WIDTH = 320;
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int BIT_DEPTH = 16;
alienblaster/project/jni/sdl/include/SDL_config_android.h
+1
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@@ -34,6 +34,7 @@
#define SDL_VIDEO_DRIVER_ANDROID 1
#define SDL_VIDEO_OPENGL_ES 1
#define SDL_VIDEO_RENDER_OGL_ES 1
#define SDL_VIDEO_RENDER_RESIZE 1
#define SDL_AUDIO_DRIVER_ANDROID 1
alienblaster/project/jni/sdl/src/video/SDL_renderer_resize.c
+307
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@@ -0,0 +1,307 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#if SDL_VIDEO_RENDER_RESIZE
#include "SDL_video.h"
#include "SDL_sysvideo.h"
#include "SDL_pixels_c.h"
#include "SDL_rect_c.h"
static int RESIZE_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int RESIZE_RenderDrawLines(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int RESIZE_RenderDrawRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
static int RESIZE_RenderFillRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
static int RESIZE_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect,
const SDL_Rect * dstrect);
static void RESIZE_DestroyRenderer(SDL_Renderer * renderer);
typedef struct
{
/* It should work fast on FPU-less processors, so I did not use floats but ints.
Hopefully compiler will somehow optimize (realW / fakeW) because it's adjacent bytes */
uint8_t realW, fakeW, realH, fakeH;
SDL_Renderer * renderer;
} RESIZE_RenderData;
static int
RESIZE_LoadFunctions(RESIZE_RenderData * data)
{
return 0;
}
int
RESIZE_CreateRenderer(SDL_Window * window)
{
SDL_Renderer * renderer;
RESIZE_RenderData * data;
int realW, realH;
int fakeW, fakeH;
realW = window->display->current_mode.w;
realH = window->display->current_mode.h;
fakeW = window->w;
fakeH = window->h;
/* Here we're assuming that both real and fake dimensins can be shrinked to byte-size ints
by dividong both in half, for example real 480x320 : fake 640x480 becomes 3x2 : 4x3 */
while( (realW / 2) * 2 == realW && (fakeW / 2) * 2 == fakeW ) {
realW /= 2;
fakeW /= 2;
}
while( (realH / 2) * 2 == realH && (fakeH / 2) * 2 == fakeH ) {
realH /= 2;
fakeH /= 2;
}
if( realW > 255 || realH > 255 || fakeW > 255 || fakeH > 255 ||
realW == 0 || realH == 0 || fakeW == 0 || fakeH == 0 )
return -1;
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return -1;
}
data = (RESIZE_RenderData *) SDL_calloc(1, sizeof(*data));
if (!data) {
SDL_free(renderer);
SDL_OutOfMemory();
return -1;
}
data->realW = realW;
data->fakeW = fakeW;
data->realH = realH;
data->fakeH = fakeH;
data->renderer = window->renderer;
memcpy(renderer, window->renderer, sizeof(SDL_Renderer));
renderer->RenderDrawPoints = RESIZE_RenderDrawPoints;
renderer->RenderDrawLines = RESIZE_RenderDrawLines;
renderer->RenderDrawRects = RESIZE_RenderDrawRects;
renderer->RenderFillRects = RESIZE_RenderFillRects;
renderer->RenderCopy = RESIZE_RenderCopy;
renderer->DestroyRenderer = RESIZE_DestroyRenderer;
renderer->driverdata = data;
window->renderer = renderer;
return 0;
}
static inline void
RESIZE_resizePoints(uint8_t realW, uint8_t fakeW, uint8_t realH, uint8_t fakeH,
const SDL_Point * src, SDL_Point * dest, int count )
{
int i;
for( i = 0; i < count; i++ ) {
dest[i].x = src[i].x * realW / fakeW;
dest[i].y = src[i].y * realH / fakeH;
}
}
static int
RESIZE_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
int count)
{
RESIZE_RenderData *data = (RESIZE_RenderData *) renderer->driverdata;
int ret;
if( !data->renderer->RenderDrawPoints )
return -1;
SDL_Point * resized = SDL_stack_alloc( SDL_Point, count );
if( ! resized ) {
SDL_OutOfMemory();
return -1;
}
RESIZE_resizePoints( data->realW, data->fakeW, data->realH, data->fakeH, points, resized, count );
ret = data->renderer->RenderDrawPoints(data->renderer, resized, count);
SDL_stack_free(resized);
return ret;
}
static int
RESIZE_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
int count)
{
RESIZE_RenderData *data = (RESIZE_RenderData *) renderer->driverdata;
int ret;
if( !data->renderer->RenderDrawLines )
return -1;
SDL_Point * resized = SDL_stack_alloc( SDL_Point, count * 2 );
if( ! resized ) {
SDL_OutOfMemory();
return -1;
}
RESIZE_resizePoints( data->realW, data->fakeW, data->realH, data->fakeH, points, resized, count * 2 );
ret = data->renderer->RenderDrawLines(data->renderer, resized, count);
SDL_stack_free(resized);
return ret;
}
static inline void
RESIZE_resizeRects(uint8_t realW, uint8_t fakeW, uint8_t realH, uint8_t fakeH,
const SDL_Rect ** src, SDL_Rect * dest, int count )
{
int i;
for( i = 0; i < count; i++ ) {
dest[i].x = src[i]->x * realW / fakeW;
dest[i].w = src[i]->w * realW / fakeW;
dest[i].y = src[i]->y * realH / fakeH;
dest[i].h = src[i]->h * realH / fakeH;
}
}
static int
RESIZE_RenderDrawRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count)
{
RESIZE_RenderData *data = (RESIZE_RenderData *) renderer->driverdata;
int i, ret;
if( !data->renderer->RenderDrawRects )
return -1;
SDL_Rect * resized = SDL_stack_alloc( SDL_Rect, count );
if( ! resized ) {
SDL_OutOfMemory();
return -1;
}
const SDL_Rect ** resizedPtrs = SDL_stack_alloc( const SDL_Rect *, count );
if( ! resizedPtrs ) {
SDL_OutOfMemory();
return -1;
}
for( i = 0; i < count; i++ ) {
resizedPtrs[i] = &(resized[i]);
}
RESIZE_resizeRects( data->realW, data->fakeW, data->realH, data->fakeH, rects, resized, count );
ret = data->renderer->RenderDrawRects(data->renderer, resizedPtrs, count);
SDL_stack_free(resizedPtrs);
SDL_stack_free(resized);
return ret;
}
static int
RESIZE_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count)
{
RESIZE_RenderData *data = (RESIZE_RenderData *) renderer->driverdata;
int i, ret;
if( !data->renderer->RenderFillRects )
return -1;
SDL_Rect * resized = SDL_stack_alloc( SDL_Rect, count );
if( ! resized ) {
SDL_OutOfMemory();
return -1;
}
const SDL_Rect ** resizedPtrs = SDL_stack_alloc( const SDL_Rect *, count );
if( ! resizedPtrs ) {
SDL_OutOfMemory();
return -1;
}
for( i = 0; i < count; i++ ) {
resizedPtrs[i] = &(resized[i]);
}
RESIZE_resizeRects( data->realW, data->fakeW, data->realH, data->fakeH, rects, resized, count * 4 );
ret = data->renderer->RenderFillRects(data->renderer, resizedPtrs, count);
SDL_stack_free(resizedPtrs);
SDL_stack_free(resized);
return ret;
}
static int
RESIZE_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
RESIZE_RenderData *data = (RESIZE_RenderData *) renderer->driverdata;
SDL_Rect dest;
uint8_t realW = data->realW, fakeW = data->fakeW, realH = data->realH, fakeH = data->fakeH;
dest.x = dstrect->x * realW / fakeW;
dest.w = dstrect->w * realW / fakeW;
dest.y = dstrect->y * realH / fakeH;
dest.h = dstrect->h * realH / fakeH;
return data->renderer->RenderCopy(data->renderer, texture, srcrect, &dest);
}
static void
RESIZE_DestroyRenderer(SDL_Renderer * renderer)
{
RESIZE_RenderData *data = (RESIZE_RenderData *) renderer->driverdata;
if (data && data->renderer && data->renderer->DestroyRenderer) {
data->renderer->DestroyRenderer(data->renderer);
}
if (data) {
SDL_free(data);
}
SDL_free(renderer);
}
#endif /* SDL_VIDEO_RENDER_RESIZE */
/* vi: set ts=4 sw=4 expandtab: */
alienblaster/project/jni/sdl/src/video/SDL_renderer_resize.h
+29
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@@ -0,0 +1,29 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/* Resizing proxy renderer implementation */
int
RESIZE_CreateRenderer(SDL_Window * window);
/* vi: set ts=4 sw=4 expandtab: */
alienblaster/project/jni/sdl/src/video/SDL_video.c
+9
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@@ -31,6 +31,7 @@
#include "SDL_renderer_gl.h"
#include "SDL_renderer_gles.h"
#include "SDL_renderer_sw.h"
#include "SDL_renderer_resize.h"
#include "../events/SDL_sysevents.h"
#include "../events/SDL_events_c.h"
@@ -1603,6 +1604,14 @@ SDL_CreateRenderer(SDL_Window * window, int index, Uint32 flags)
SDL_SelectRenderer(window);
#ifdef SDL_VIDEO_RENDER_RESIZE
if( window->w > window->display->current_mode.w || window->h > window->display->current_mode.h ) {
RESIZE_CreateRenderer(window);
}
#endif
return 0;
}