Mercurial > sdl-ios-xcode

comparison src/video/SDL_renderer_gl.c @ 1985:8055185ae4ed

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added source color and alpha modulation support. Added perl script to generate optimized render copy functions.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 28 Aug 2006 03:17:39 +0000
parents ccef0d0c40c6
children f4c65e3bfaed
comparison
equal deleted inserted replaced
1984:b910bcabec26 1985:8055185ae4ed
29 #include "SDL_pixels_c.h" 29 #include "SDL_pixels_c.h"
30 #include "SDL_rect_c.h" 30 #include "SDL_rect_c.h"
31 #include "SDL_yuv_sw_c.h" 31 #include "SDL_yuv_sw_c.h"
32 32
33 /* OpenGL renderer implementation */ 33 /* OpenGL renderer implementation */
34
35 static const float inv255f = 1.0f / 255.0f;
34 36
35 static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags); 37 static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags);
36 static int GL_ActivateRenderer(SDL_Renderer * renderer); 38 static int GL_ActivateRenderer(SDL_Renderer * renderer);
37 static int GL_DisplayModeChanged(SDL_Renderer * renderer); 39 static int GL_DisplayModeChanged(SDL_Renderer * renderer);
38 static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture); 40 static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
41 const SDL_Color * colors, int firstcolor, 43 const SDL_Color * colors, int firstcolor,
42 int ncolors); 44 int ncolors);
43 static int GL_GetTexturePalette(SDL_Renderer * renderer, 45 static int GL_GetTexturePalette(SDL_Renderer * renderer,
44 SDL_Texture * texture, SDL_Color * colors, 46 SDL_Texture * texture, SDL_Color * colors,
45 int firstcolor, int ncolors); 47 int firstcolor, int ncolors);
48 static int GL_SetTextureColorMod(SDL_Renderer * renderer,
49 SDL_Texture * texture);
50 static int GL_SetTextureAlphaMod(SDL_Renderer * renderer,
51 SDL_Texture * texture);
52 static int GL_SetTextureBlendMode(SDL_Renderer * renderer,
53 SDL_Texture * texture);
54 static int GL_SetTextureScaleMode(SDL_Renderer * renderer,
55 SDL_Texture * texture);
46 static int GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture, 56 static int GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
47 const SDL_Rect * rect, const void *pixels, 57 const SDL_Rect * rect, const void *pixels,
48 int pitch); 58 int pitch);
49 static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture, 59 static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
50 const SDL_Rect * rect, int markDirty, 60 const SDL_Rect * rect, int markDirty, void **pixels,
51 void **pixels, int *pitch); 61 int *pitch);
52 static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture); 62 static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
53 static void GL_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture, 63 static void GL_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
54 int numrects, const SDL_Rect * rects); 64 int numrects, const SDL_Rect * rects);
55 static int GL_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect, 65 static int GL_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
56 Uint32 color); 66 Uint8 a, const SDL_Rect * rect);
57 static int GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, 67 static int GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
58 const SDL_Rect * srcrect, const SDL_Rect * dstrect, 68 const SDL_Rect * srcrect, const SDL_Rect * dstrect);
59 int blendMode, int scaleMode);
60 static void GL_RenderPresent(SDL_Renderer * renderer); 69 static void GL_RenderPresent(SDL_Renderer * renderer);
61 static void GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture); 70 static void GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
62 static void GL_DestroyRenderer(SDL_Renderer * renderer); 71 static void GL_DestroyRenderer(SDL_Renderer * renderer);
63 72
64 73
66 GL_CreateRenderer, 75 GL_CreateRenderer,
67 { 76 {
68 "opengl", 77 "opengl",
69 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD | 78 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD |
70 SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED), 79 SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),
80 (SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |
81 SDL_TEXTUREMODULATE_ALPHA),
71 (SDL_TEXTUREBLENDMODE_NONE | SDL_TEXTUREBLENDMODE_MASK | 82 (SDL_TEXTUREBLENDMODE_NONE | SDL_TEXTUREBLENDMODE_MASK |
72 SDL_TEXTUREBLENDMODE_BLEND | SDL_TEXTUREBLENDMODE_ADD | 83 SDL_TEXTUREBLENDMODE_BLEND | SDL_TEXTUREBLENDMODE_ADD |
73 SDL_TEXTUREBLENDMODE_MOD), 84 SDL_TEXTUREBLENDMODE_MOD),
74 (SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST | 85 (SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST |
75 SDL_TEXTURESCALEMODE_SLOW), 86 SDL_TEXTURESCALEMODE_SLOW),
234 renderer->ActivateRenderer = GL_ActivateRenderer; 245 renderer->ActivateRenderer = GL_ActivateRenderer;
235 renderer->DisplayModeChanged = GL_DisplayModeChanged; 246 renderer->DisplayModeChanged = GL_DisplayModeChanged;
236 renderer->CreateTexture = GL_CreateTexture; 247 renderer->CreateTexture = GL_CreateTexture;
237 renderer->SetTexturePalette = GL_SetTexturePalette; 248 renderer->SetTexturePalette = GL_SetTexturePalette;
238 renderer->GetTexturePalette = GL_GetTexturePalette; 249 renderer->GetTexturePalette = GL_GetTexturePalette;
250 renderer->SetTextureColorMod = GL_SetTextureColorMod;
251 renderer->SetTextureAlphaMod = GL_SetTextureAlphaMod;
252 renderer->SetTextureBlendMode = GL_SetTextureBlendMode;
253 renderer->SetTextureScaleMode = GL_SetTextureScaleMode;
239 renderer->UpdateTexture = GL_UpdateTexture; 254 renderer->UpdateTexture = GL_UpdateTexture;
240 renderer->LockTexture = GL_LockTexture; 255 renderer->LockTexture = GL_LockTexture;
241 renderer->UnlockTexture = GL_UnlockTexture; 256 renderer->UnlockTexture = GL_UnlockTexture;
242 renderer->DirtyTexture = GL_DirtyTexture; 257 renderer->DirtyTexture = GL_DirtyTexture;
243 renderer->RenderFill = GL_RenderFill; 258 renderer->RenderFill = GL_RenderFill;
568 renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, 583 renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH,
569 pitch / SDL_BYTESPERPIXEL(texture->format)); 584 pitch / SDL_BYTESPERPIXEL(texture->format));
570 } 585 }
571 586
572 static int 587 static int
588 GL_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
589 {
590 return -1;
591 }
592
593 static int
594 GL_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
595 {
596 return -1;
597 }
598
599 static int
600 GL_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
601 {
602 switch (texture->blendMode) {
603 case SDL_TEXTUREBLENDMODE_NONE:
604 case SDL_TEXTUREBLENDMODE_MASK:
605 case SDL_TEXTUREBLENDMODE_BLEND:
606 case SDL_TEXTUREBLENDMODE_ADD:
607 case SDL_TEXTUREBLENDMODE_MOD:
608 return 0;
609 default:
610 SDL_Unsupported();
611 texture->blendMode = SDL_TEXTUREBLENDMODE_NONE;
612 return -1;
613 }
614 }
615
616 static int
617 GL_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
618 {
619 switch (texture->scaleMode) {
620 case SDL_TEXTURESCALEMODE_NONE:
621 case SDL_TEXTURESCALEMODE_FAST:
622 case SDL_TEXTURESCALEMODE_SLOW:
623 return 0;
624 case SDL_TEXTURESCALEMODE_BEST:
625 SDL_Unsupported();
626 texture->scaleMode = SDL_TEXTURESCALEMODE_SLOW;
627 return -1;
628 default:
629 SDL_Unsupported();
630 texture->scaleMode = SDL_TEXTURESCALEMODE_NONE;
631 return -1;
632 }
633 }
634
635 static int
573 GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture, 636 GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
574 const SDL_Rect * rect, const void *pixels, int pitch) 637 const SDL_Rect * rect, const void *pixels, int pitch)
575 { 638 {
576 GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata; 639 GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
577 GL_TextureData *data = (GL_TextureData *) texture->driverdata; 640 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
634 SDL_AddDirtyRect(&data->dirty, &rects[i]); 697 SDL_AddDirtyRect(&data->dirty, &rects[i]);
635 } 698 }
636 } 699 }
637 700
638 static int 701 static int
639 GL_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 color) 702 GL_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b, Uint8 a,
703 const SDL_Rect * rect)
640 { 704 {
641 GL_RenderData *data = (GL_RenderData *) renderer->driverdata; 705 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
642 SDL_Window *window = SDL_GetWindowFromID(renderer->window); 706 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
643 GLclampf r, g, b, a; 707
644 708 data->glClearColor((GLclampf) r * inv255f, (GLclampf) g * inv255f,
645 a = ((GLclampf) ((color >> 24) & 0xFF)) / 255.0f; 709 (GLclampf) b * inv255f, (GLclampf) a * inv255f);
646 r = ((GLclampf) ((color >> 16) & 0xFF)) / 255.0f;
647 g = ((GLclampf) ((color >> 8) & 0xFF)) / 255.0f;
648 b = ((GLclampf) (color & 0xFF)) / 255.0f;
649
650 data->glClearColor(r, g, b, a);
651 data->glViewport(rect->x, window->h - rect->y, rect->w, rect->h); 710 data->glViewport(rect->x, window->h - rect->y, rect->w, rect->h);
652 data->glClear(GL_COLOR_BUFFER_BIT); 711 data->glClear(GL_COLOR_BUFFER_BIT);
653 data->glViewport(0, 0, window->w, window->h); 712 data->glViewport(0, 0, window->w, window->h);
654 return 0; 713 return 0;
655 } 714 }
656 715
657 static int 716 static int
658 GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, 717 GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
659 const SDL_Rect * srcrect, const SDL_Rect * dstrect, 718 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
660 int blendMode, int scaleMode)
661 { 719 {
662 GL_RenderData *data = (GL_RenderData *) renderer->driverdata; 720 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
663 GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata; 721 GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
664 int minx, miny, maxx, maxy; 722 int minx, miny, maxx, maxy;
665 GLfloat minu, maxu, minv, maxv; 723 GLfloat minu, maxu, minv, maxv;
698 maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h; 756 maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
699 maxv *= texturedata->texh; 757 maxv *= texturedata->texh;
700 758
701 data->glBindTexture(texturedata->type, texturedata->texture); 759 data->glBindTexture(texturedata->type, texturedata->texture);
702 760
703 if (blendMode != data->blendMode) { 761 if (texture->modMode) {
704 switch (blendMode) { 762 data->glColor4f((GLfloat) texture->r * inv255f,
763 (GLfloat) texture->g * inv255f,
764 (GLfloat) texture->b * inv255f,
765 (GLfloat) texture->a * inv255f);
766 } else {
767 data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
768 }
769
770 if (texture->blendMode != data->blendMode) {
771 switch (texture->blendMode) {
705 case SDL_TEXTUREBLENDMODE_NONE: 772 case SDL_TEXTUREBLENDMODE_NONE:
706 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); 773 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
707 data->glDisable(GL_BLEND); 774 data->glDisable(GL_BLEND);
708 break; 775 break;
709 case SDL_TEXTUREBLENDMODE_MASK: 776 case SDL_TEXTUREBLENDMODE_MASK:
721 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); 788 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
722 data->glEnable(GL_BLEND); 789 data->glEnable(GL_BLEND);
723 data->glBlendFunc(GL_ZERO, GL_SRC_COLOR); 790 data->glBlendFunc(GL_ZERO, GL_SRC_COLOR);
724 break; 791 break;
725 } 792 }
726 data->blendMode = blendMode; 793 data->blendMode = texture->blendMode;
727 } 794 }
728 795
729 if (scaleMode != data->scaleMode) { 796 if (texture->scaleMode != data->scaleMode) {
730 switch (scaleMode) { 797 switch (texture->scaleMode) {
731 case SDL_TEXTURESCALEMODE_NONE: 798 case SDL_TEXTURESCALEMODE_NONE:
732 case SDL_TEXTURESCALEMODE_FAST: 799 case SDL_TEXTURESCALEMODE_FAST:
733 data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER, 800 data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
734 GL_NEAREST); 801 GL_NEAREST);
735 data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER, 802 data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
741 GL_LINEAR); 808 GL_LINEAR);
742 data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER, 809 data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
743 GL_LINEAR); 810 GL_LINEAR);
744 break; 811 break;
745 } 812 }
746 data->scaleMode = scaleMode; 813 data->scaleMode = texture->scaleMode;
747 } 814 }
748 815
749 data->glBegin(GL_TRIANGLE_STRIP); 816 data->glBegin(GL_TRIANGLE_STRIP);
750 data->glTexCoord2f(minu, minv); 817 data->glTexCoord2f(minu, minv);
751 data->glVertex2i(minx, miny); 818 data->glVertex2i(minx, miny);