86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
#define GINT_NEED_VRAM
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#include <gint/defs/types.h>
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#include <gint/display.h>
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#include "bopti-asm.h"
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struct box {
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/* Target location of top-left corner */
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int x, y;
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/* Width and height of rendered sub-image */
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int w, h;
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/* Source bounding box (low included, high excluded) */
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int left, top;
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};
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enum {
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PX_R5G6B5 = 0,
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PX_R5G6B5A = 1,
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PX_P8 = 2,
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PX_P4 = 3,
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};
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void bopti_render(image_t const *img, struct box *box)
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{
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/* Offset in video RAM and output stride */
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uint16_t *target = vram + (396 * box->y + box->x);
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int out = 2 * (396 - box->w);
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int profile = img->profile;
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if(profile == PX_R5G6B5 || profile == PX_R5G6B5A)
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{
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uint16_t const *data = img->data;
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int w = box->w;
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int h = box->h;
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data += img->width * box->top + box->left;
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/* Input stride */
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int in = 2 * (img->width - w);
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if(profile == PX_R5G6B5)
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bopti_r5g6b5(data, target, w, h, in, out);
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else
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bopti_r5g6b5a(data, target, w, h, in, out, img->alpha);
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}
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else if(profile == PX_P8)
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{
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#warning TODO: PX_P8
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}
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else if(profile == PX_P4)
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{
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#warning TODO: PX_P4
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}
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}
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void bopti_render_clip(int x, int y, image_t const *img, int left, int top,
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int width, int height)
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{
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/* Adjust the bounding box of the input image */
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if(left < 0) width += left, x -= left, left = 0;
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if(top < 0) height += top, y -= top, top = 0;
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if(left + width > img->width) width = img->width - left;
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if(top + height > img->height) height = img->height - top;
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/* Check whether the box intersects the screen */
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if(width <= 0 || height <= 0) return;
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if(x + width <= 0 || x >= 396 || y + height <= 0 || y >= 224) return;
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/* Intersect with the bounding box on-screen */
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if(y < 0) top -= y, height += y, y = 0;
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if(y + height > 224) height = (224 - y);
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if(x < 0) left -= x, width += x, x = 0;
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if(x + width > 396) width = (396 - x);
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/* Finish with the renderer */
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struct box box = { x, y, width, height, left, top };
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bopti_render(img, &box);
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}
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void bopti_render_noclip(int x, int y, image_t const *img, int left, int top,
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int width, int height)
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{
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struct box box = { x, y, width, height, left, top };
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bopti_render(img, &box);
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}
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