//
// C Implementation: texture
//
-// Description:
+// Description:
//
//
// Author: Tobias Glaesser <tobi.web@gmx.de>, (C) 2004
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
-#include <SDL/SDL_opengl.h>
#include "globals.h"
#include "screen.h"
#include "setup.h"
#include "texture.h"
-void texture_load(texture_type* ptexture, char * file, int use_alpha)
+void (*texture_load) (texture_type* ptexture, char * file, int use_alpha);
+void (*texture_load_part) (texture_type* ptexture, char * file, int x, int y, int w, int h, int use_alpha);
+void (*texture_free) (texture_type* ptexture);
+void (*texture_draw) (texture_type* ptexture, float x, float y, int update);
+void (*texture_draw_bg) (texture_type* ptexture, int update);
+void (*texture_draw_part) (texture_type* ptexture, float sx, float sy, float x, float y, float w, float h, int update);
+
+
+void texture_setup(void)
+{
+#ifdef NOOPENGL
+ texture_load = texture_load_sdl;
+ texture_load_part = texture_load_part_sdl;
+ texture_free = texture_free_sdl;
+ texture_draw = texture_draw_sdl;
+ texture_draw_bg = texture_draw_bg_sdl;
+ texture_draw_part = texture_draw_part_sdl;
+#else
+
+ if(use_gl)
+ {
+ texture_load = texture_load_gl;
+ texture_load_part = texture_load_part_gl;
+ texture_free = texture_free_gl;
+ texture_draw = texture_draw_gl;
+ texture_draw_bg = texture_draw_bg_gl;
+ texture_draw_part = texture_draw_part_gl;
+ }
+ else
+ {
+ texture_load = texture_load_sdl;
+ texture_load_part = texture_load_part_sdl;
+ texture_free = texture_free_sdl;
+ texture_draw = texture_draw_sdl;
+ texture_draw_bg = texture_draw_bg_sdl;
+ texture_draw_part = texture_draw_part_sdl;
+ }
+#endif
+}
+
+#ifndef NOOPENGL
+void texture_load_gl(texture_type* ptexture, char * file, int use_alpha)
+{
+ texture_load_sdl(ptexture,file,use_alpha);
+ texture_create_gl(ptexture->sdl_surface,&ptexture->gl_texture);
+}
+
+void texture_load_part_gl(texture_type* ptexture, char * file, int x, int y, int w, int h, int use_alpha)
+{
+ texture_load_part_sdl(ptexture,file,x,y,w,h,use_alpha);
+ texture_create_gl(ptexture->sdl_surface,&ptexture->gl_texture);
+}
+
+/* Quick utility function for texture creation */
+static int power_of_two(int input)
+{
+ int value = 1;
+
+ while ( value < input ) {
+ value <<= 1;
+ }
+ return value;
+}
+
+void texture_create_gl(SDL_Surface * surf, GLuint * tex)
+{
+ Uint32 saved_flags;
+ Uint8 saved_alpha;
+ int w, h;
+ SDL_Surface *conv;
+
+ w = power_of_two(surf->w);
+ h = power_of_two(surf->h),
+ conv = SDL_CreateRGBSurface(surf->flags, w, h, surf->format->BitsPerPixel,
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ 0xff000000, 0x00ff0000, 0x0000ff00, 0x000000ff);
+#else
+
+ 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
+#endif
+
+ /* Save the alpha blending attributes */
+ saved_flags = surf->flags&(SDL_SRCALPHA|SDL_RLEACCELOK);
+ saved_alpha = surf->format->alpha;
+ if ( (saved_flags & SDL_SRCALPHA)
+ == SDL_SRCALPHA )
+ {
+ SDL_SetAlpha(surf, 0, 0);
+ }
+
+ SDL_BlitSurface(surf, 0, conv, 0);
+
+ /* Restore the alpha blending attributes */
+ if ( (saved_flags & SDL_SRCALPHA)
+ == SDL_SRCALPHA )
+ {
+ SDL_SetAlpha(surf, saved_flags, saved_alpha);
+ }
+
+
+ glGenTextures(1, &*tex);
+
+ glBindTexture(GL_TEXTURE_2D , *tex);
+ glEnable(GL_TEXTURE_2D);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, conv->pitch / conv->format->BytesPerPixel);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, conv->pixels);
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ glDisable(GL_BLEND);
+ SDL_FreeSurface(conv);
+}
+
+void texture_free_gl(texture_type* ptexture)
+{
+ SDL_FreeSurface(ptexture->sdl_surface);
+ glDeleteTextures(1, &ptexture->gl_texture);
+}
+
+void texture_draw_gl(texture_type* ptexture, float x, float y, int update)
+{
+float pw = power_of_two(ptexture->w);
+float ph = power_of_two(ptexture->h);
+
+ glEnable(GL_TEXTURE_2D);
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+ glColor4ub(255, 255, 255,255);
+
+ glBindTexture(GL_TEXTURE_2D, ptexture->gl_texture);
+
+ glBegin(GL_QUADS);
+ glTexCoord2f(0, 0);
+ glVertex2f(x, y);
+ glTexCoord2f((float)ptexture->w / pw, 0);
+ glVertex2f((float)ptexture->w+x, y);
+ glTexCoord2f((float)ptexture->w / pw, (float)ptexture->h / ph); glVertex2f((float)ptexture->w+x, (float)ptexture->h+y);
+ glTexCoord2f(0, (float)ptexture->h / ph);
+ glVertex2f(x, (float)ptexture->h+y);
+ glEnd();
+
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_BLEND);
+}
+
+void texture_draw_bg_gl(texture_type* ptexture, int update)
+{
+float pw = power_of_two(ptexture->w);
+float ph = power_of_two(ptexture->h);
+
+ glColor3ub(255, 255, 255);
+
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, ptexture->gl_texture);
+
+ glBegin(GL_QUADS);
+ glTexCoord2f(0, 0);
+ glVertex2f(0, 0);
+ glTexCoord2f((float)ptexture->w / pw, 0);
+ glVertex2f(screen->w, 0);
+ glTexCoord2f((float)ptexture->w / pw, (float)ptexture->h / ph);
+ glVertex2f(screen->w, screen->h);
+ glTexCoord2f(0, (float)ptexture->h / ph);
+ glVertex2f(0, screen->h);
+ glEnd();
+
+ glDisable(GL_TEXTURE_2D);
+}
+
+void texture_draw_part_gl(texture_type* ptexture,float sx, float sy, float x, float y, float w, float h, int update)
+{
+float pw = power_of_two(ptexture->w);
+float ph = power_of_two(ptexture->h);
+
+ glBindTexture(GL_TEXTURE_2D, ptexture->gl_texture);
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+ glColor4ub(255, 255, 255,255);
+
+ glEnable(GL_TEXTURE_2D);
+
+
+ glBegin(GL_QUADS);
+ glTexCoord2f(sx / pw, sy / ph);
+ glVertex2f(x, y);
+ glTexCoord2f((float)(sx + w) / pw, sy / ph);
+ glVertex2f(w+x, y);
+ glTexCoord2f((sx+w) / pw, (sy+h) / ph);
+ glVertex2f(w +x, h+y);
+ glTexCoord2f(sx / pw, (float)(sy+h) / ph);
+ glVertex2f(x, h+y);
+ glEnd();
+
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_BLEND);
+
+}
+#endif
+
+void texture_load_sdl(texture_type* ptexture, char * file, int use_alpha)
{
SDL_Surface * temp;
if (temp == NULL)
st_abort("Can't load", file);
+ if(use_alpha == IGNORE_ALPHA)
+ ptexture->sdl_surface = SDL_DisplayFormat(temp);
+ else
ptexture->sdl_surface = SDL_DisplayFormatAlpha(temp);
if (ptexture->sdl_surface == NULL)
ptexture->w = ptexture->sdl_surface->w;
ptexture->h = ptexture->sdl_surface->h;
- if(use_gl)
- {
- create_gl_texture(ptexture->sdl_surface,&ptexture->gl_texture);
- }
}
-void texture_from_sdl_surface(texture_type* ptexture, SDL_Surface* sdl_surf, int use_alpha)
+void texture_load_part_sdl(texture_type* ptexture, char * file, int x, int y, int w, int h, int use_alpha)
{
- /* SDL_Surface * temp;
+
+ SDL_Rect src;
+ SDL_Surface * temp;
+ SDL_Surface * conv;
temp = IMG_Load(file);
if (temp == NULL)
- st_abort("Can't load", file);*/
+ st_abort("Can't load", file);
- ptexture->sdl_surface = SDL_DisplayFormatAlpha(sdl_surf);
+ /* Set source rectangle for conv: */
+
+ src.x = x;
+ src.y = y;
+ src.w = w;
+ src.h = h;
+
+ conv = SDL_CreateRGBSurface(temp->flags, w, h, temp->format->BitsPerPixel,
+ temp->format->Rmask,
+ temp->format->Gmask,
+ temp->format->Bmask,
+ temp->format->Amask);
+
+ /* #if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ 0xff000000, 0x00ff0000, 0x0000ff00, 0x000000ff);
+ #else
+
+ 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
+ #endif*/
+
+ SDL_SetAlpha(temp,0,0);
+
+ SDL_BlitSurface(temp, &src, conv, NULL);
+ if(use_alpha == IGNORE_ALPHA)
+ ptexture->sdl_surface = SDL_DisplayFormat(conv);
+ else
+ ptexture->sdl_surface = SDL_DisplayFormatAlpha(conv);
if (ptexture->sdl_surface == NULL)
- st_abort("Can't covert to display format", "SURFACE");
+ st_abort("Can't covert to display format", file);
if (use_alpha == IGNORE_ALPHA)
SDL_SetAlpha(ptexture->sdl_surface, 0, 0);
+ SDL_FreeSurface(temp);
+ SDL_FreeSurface(conv);
+
ptexture->w = ptexture->sdl_surface->w;
ptexture->h = ptexture->sdl_surface->h;
-
- if(use_gl)
- {
- create_gl_texture(ptexture->sdl_surface,&ptexture->gl_texture);
- }
}
-void texture_draw(texture_type* ptexture, float x, float y, int update)
+void texture_from_sdl_surface(texture_type* ptexture, SDL_Surface* sdl_surf, int use_alpha)
{
- if(use_gl)
+ Uint32 saved_flags;
+ Uint8 saved_alpha;
+
+ /* Save the alpha blending attributes */
+ saved_flags = sdl_surf->flags&(SDL_SRCALPHA|SDL_RLEACCELOK);
+ saved_alpha = sdl_surf->format->alpha;
+ if ( (saved_flags & SDL_SRCALPHA)
+ == SDL_SRCALPHA )
{
- glColor4ub(255, 255, 255,255);
- glBlendFunc (GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
- glEnable (GL_BLEND);
- glBindTexture(GL_TEXTURE_RECTANGLE_NV, ptexture->gl_texture);
-
- glBegin(GL_QUADS);
- glTexCoord2f(0, 0);
- glVertex2f(x, y);
- glTexCoord2f((float)ptexture->w, 0);
- glVertex2f((float)ptexture->w+x, y);
- glTexCoord2f((float)ptexture->w, (float)ptexture->h);
- glVertex2f((float)ptexture->w+x, (float)ptexture->h+y);
- glTexCoord2f(0, (float)ptexture->h);
- glVertex2f(x, (float)ptexture->h+y);
- glEnd();
+ SDL_SetAlpha(sdl_surf, 0, 0);
}
+
+ if(use_alpha == IGNORE_ALPHA)
+ ptexture->sdl_surface = SDL_DisplayFormat(sdl_surf);
else
+ ptexture->sdl_surface = SDL_DisplayFormatAlpha(sdl_surf);
+
+ /* Restore the alpha blending attributes */
+ if ( (saved_flags & SDL_SRCALPHA)
+ == SDL_SRCALPHA )
{
- SDL_Rect dest;
+ SDL_SetAlpha(ptexture->sdl_surface, saved_flags, saved_alpha);
+ }
+
+ if (ptexture->sdl_surface == NULL)
+ st_abort("Can't covert to display format", "SURFACE");
+
+ if (use_alpha == IGNORE_ALPHA)
+ SDL_SetAlpha(ptexture->sdl_surface, 0, 0);
- dest.x = x;
- dest.y = y;
- dest.w = ptexture->w;
- dest.h = ptexture->h;
+ ptexture->w = ptexture->sdl_surface->w;
+ ptexture->h = ptexture->sdl_surface->h;
- SDL_BlitSurface(ptexture->sdl_surface, NULL, screen, &dest);
+#ifndef NOOPENGL
- if (update == UPDATE)
- SDL_UpdateRect(screen, dest.x, dest.y, dest.w, dest.h);
+ if(use_gl)
+ {
+ texture_create_gl(ptexture->sdl_surface,&ptexture->gl_texture);
}
+#endif
}
-void texture_draw_bg(texture_type* ptexture, int update)
+void texture_draw_sdl(texture_type* ptexture, float x, float y, int update)
{
-if(use_gl)
-{
- //glColor3ub(255, 255, 255);
- glEnable(GL_TEXTURE_RECTANGLE_NV);
- glBindTexture(GL_TEXTURE_RECTANGLE_NV, ptexture->gl_texture);
+ SDL_Rect dest;
- glBegin(GL_QUADS);
- glTexCoord2f(0, 0); glVertex2f(0, 0);
- glTexCoord2f((float)ptexture->w, 0); glVertex2f(screen->w, 0);
- glTexCoord2f((float)ptexture->w, (float)ptexture->h); glVertex2f(screen->w, screen->h);
- glTexCoord2f(0, (float)ptexture->h); glVertex2f(0, screen->h);
- glEnd();
-
+ dest.x = (int)x;
+ dest.y = (int)y;
+ dest.w = ptexture->w;
+ dest.h = ptexture->h;
+ SDL_BlitSurface(ptexture->sdl_surface, NULL, screen, &dest);
+
+ if (update == UPDATE)
+ SDL_UpdateRect(screen, dest.x, dest.y, dest.w, dest.h);
}
-else
+
+
+void texture_draw_bg_sdl(texture_type* ptexture, int update)
{
SDL_Rect dest;
dest.w = screen->w;
dest.h = screen->h;
- SDL_BlitSurface(ptexture->sdl_surface, NULL, screen, &dest);
+ SDL_SoftStretch(ptexture->sdl_surface, NULL, screen, &dest);
if (update == UPDATE)
SDL_UpdateRect(screen, dest.x, dest.y, dest.w, dest.h);
}
-}
-void texture_draw_part(texture_type* ptexture, float x, float y, float w, float h, int update)
+void texture_draw_part_sdl(texture_type* ptexture, float sx, float sy, float x, float y, float w, float h, int update)
{
- if(use_gl)
- {
- glColor3ub(255, 255, 255);
-
- glEnable(GL_TEXTURE_RECTANGLE_NV);
- glBindTexture(GL_TEXTURE_RECTANGLE_NV, ptexture->gl_texture);
-
- glBegin(GL_QUADS);
- glTexCoord2f(x, y);
- glVertex2f(x, y);
- glTexCoord2f(x+w, y);
- glVertex2f(w+x, y);
- glTexCoord2f(x+w, y+h);
- glVertex2f(w+x, h+y);
- glTexCoord2f(x, y+h);
- glVertex2f(x, h+y);
- glEnd();
- }
- else
- {
- SDL_Rect src, dest;
+ SDL_Rect src, dest;
- src.x = x;
- src.y = y;
- src.w = w;
- src.h = h;
+ src.x = (int)sx;
+ src.y = (int)sy;
+ src.w = (int)w;
+ src.h = (int)h;
- dest.x = x;
- dest.y = y;
- dest.w = w;
- dest.h = h;
+ dest.x = (int)x;
+ dest.y = (int)y;
+ dest.w = (int)w;
+ dest.h = (int)h;
- SDL_BlitSurface(ptexture->sdl_surface, &src, screen, &dest);
+ SDL_BlitSurface(ptexture->sdl_surface, &src, screen, &dest);
- if (update == UPDATE)
- update_rect(screen, dest.x, dest.y, dest.w, dest.h);
- }
+ if (update == UPDATE)
+ update_rect(screen, dest.x, dest.y, dest.w, dest.h);
}
-void texture_free(texture_type* ptexture)
+void texture_free_sdl(texture_type* ptexture)
{
SDL_FreeSurface(ptexture->sdl_surface);
- if(use_gl)
- glDeleteTextures(1, &ptexture->gl_texture);
}
projects / supertux.git / blobdiff