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-rw-r--r--minui/graphics.cpp459
1 files changed, 251 insertions, 208 deletions
diff --git a/minui/graphics.cpp b/minui/graphics.cpp
index 3bfce11d8..56f471bce 100644
--- a/minui/graphics.cpp
+++ b/minui/graphics.cpp
@@ -16,6 +16,7 @@
#include "graphics.h"
+#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -35,281 +36,311 @@ static int overscan_percent = OVERSCAN_PERCENT;
static int overscan_offset_x = 0;
static int overscan_offset_y = 0;
-static unsigned char gr_current_r = 255;
-static unsigned char gr_current_g = 255;
-static unsigned char gr_current_b = 255;
-static unsigned char gr_current_a = 255;
+static uint32_t gr_current = ~0;
+static constexpr uint32_t alpha_mask = 0xff000000;
static GRSurface* gr_draw = NULL;
+static GRRotation rotation = ROTATION_NONE;
-static bool outside(int x, int y)
-{
- return x < 0 || x >= gr_draw->width || y < 0 || y >= gr_draw->height;
+static bool outside(int x, int y) {
+ return x < 0 || x >= (rotation % 2 ? gr_draw->height : gr_draw->width) || y < 0 ||
+ y >= (rotation % 2 ? gr_draw->width : gr_draw->height);
}
-const GRFont* gr_sys_font()
-{
- return gr_font;
+const GRFont* gr_sys_font() {
+ return gr_font;
}
-int gr_measure(const GRFont* font, const char *s)
-{
- return font->char_width * strlen(s);
+int gr_measure(const GRFont* font, const char* s) {
+ return font->char_width * strlen(s);
}
-void gr_font_size(const GRFont* font, int *x, int *y)
-{
- *x = font->char_width;
- *y = font->char_height;
+void gr_font_size(const GRFont* font, int* x, int* y) {
+ *x = font->char_width;
+ *y = font->char_height;
}
-static void text_blend(unsigned char* src_p, int src_row_bytes,
- unsigned char* dst_p, int dst_row_bytes,
- int width, int height)
-{
- for (int j = 0; j < height; ++j) {
- unsigned char* sx = src_p;
- unsigned char* px = dst_p;
- for (int i = 0; i < width; ++i) {
- unsigned char a = *sx++;
- if (gr_current_a < 255) a = ((int)a * gr_current_a) / 255;
- if (a == 255) {
- *px++ = gr_current_r;
- *px++ = gr_current_g;
- *px++ = gr_current_b;
- px++;
- } else if (a > 0) {
- *px = (*px * (255-a) + gr_current_r * a) / 255;
- ++px;
- *px = (*px * (255-a) + gr_current_g * a) / 255;
- ++px;
- *px = (*px * (255-a) + gr_current_b * a) / 255;
- ++px;
- ++px;
- } else {
- px += 4;
- }
- }
- src_p += src_row_bytes;
- dst_p += dst_row_bytes;
- }
+// Blends gr_current onto pix value, assumes alpha as most significant byte.
+static inline uint32_t pixel_blend(uint8_t alpha, uint32_t pix) {
+ if (alpha == 255) return gr_current;
+ if (alpha == 0) return pix;
+ uint32_t pix_r = pix & 0xff;
+ uint32_t pix_g = pix & 0xff00;
+ uint32_t pix_b = pix & 0xff0000;
+ uint32_t cur_r = gr_current & 0xff;
+ uint32_t cur_g = gr_current & 0xff00;
+ uint32_t cur_b = gr_current & 0xff0000;
+
+ uint32_t out_r = (pix_r * (255 - alpha) + cur_r * alpha) / 255;
+ uint32_t out_g = (pix_g * (255 - alpha) + cur_g * alpha) / 255;
+ uint32_t out_b = (pix_b * (255 - alpha) + cur_b * alpha) / 255;
+
+ return (out_r & 0xff) | (out_g & 0xff00) | (out_b & 0xff0000) | (gr_current & 0xff000000);
}
-void gr_text(const GRFont* font, int x, int y, const char *s, bool bold)
-{
- if (!font->texture || gr_current_a == 0) return;
+// increments pixel pointer right, with current rotation.
+static void incr_x(uint32_t** p, int row_pixels) {
+ if (rotation % 2) {
+ *p = *p + (rotation == 1 ? 1 : -1) * row_pixels;
+ } else {
+ *p = *p + (rotation ? -1 : 1);
+ }
+}
- bold = bold && (font->texture->height != font->char_height);
+// increments pixel pointer down, with current rotation.
+static void incr_y(uint32_t** p, int row_pixels) {
+ if (rotation % 2) {
+ *p = *p + (rotation == 1 ? -1 : 1);
+ } else {
+ *p = *p + (rotation ? -1 : 1) * row_pixels;
+ }
+}
- x += overscan_offset_x;
- y += overscan_offset_y;
+// returns pixel pointer at given coordinates with rotation adjustment.
+static uint32_t* pixel_at(GRSurface* surf, int x, int y, int row_pixels) {
+ switch (rotation) {
+ case ROTATION_NONE:
+ return reinterpret_cast<uint32_t*>(surf->data) + y * row_pixels + x;
+ case ROTATION_RIGHT:
+ return reinterpret_cast<uint32_t*>(surf->data) + x * row_pixels + (surf->width - y);
+ case ROTATION_DOWN:
+ return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - y) * row_pixels +
+ (surf->width - 1 - x);
+ case ROTATION_LEFT:
+ return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - x) * row_pixels + y;
+ default:
+ printf("invalid rotation %d", rotation);
+ }
+ return nullptr;
+}
- unsigned char ch;
- while ((ch = *s++)) {
- if (outside(x, y) || outside(x+font->char_width-1, y+font->char_height-1)) break;
+static void text_blend(uint8_t* src_p, int src_row_bytes, uint32_t* dst_p, int dst_row_pixels,
+ int width, int height) {
+ uint8_t alpha_current = static_cast<uint8_t>((alpha_mask & gr_current) >> 24);
+ for (int j = 0; j < height; ++j) {
+ uint8_t* sx = src_p;
+ uint32_t* px = dst_p;
+ for (int i = 0; i < width; ++i, incr_x(&px, dst_row_pixels)) {
+ uint8_t a = *sx++;
+ if (alpha_current < 255) a = (static_cast<uint32_t>(a) * alpha_current) / 255;
+ *px = pixel_blend(a, *px);
+ }
+ src_p += src_row_bytes;
+ incr_y(&dst_p, dst_row_pixels);
+ }
+}
+
+void gr_text(const GRFont* font, int x, int y, const char* s, bool bold) {
+ if (!font || !font->texture || (gr_current & alpha_mask) == 0) return;
+
+ if (font->texture->pixel_bytes != 1) {
+ printf("gr_text: font has wrong format\n");
+ return;
+ }
- if (ch < ' ' || ch > '~') {
- ch = '?';
- }
+ bold = bold && (font->texture->height != font->char_height);
- unsigned char* src_p = font->texture->data + ((ch - ' ') * font->char_width) +
- (bold ? font->char_height * font->texture->row_bytes : 0);
- unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes;
+ x += overscan_offset_x;
+ y += overscan_offset_y;
- text_blend(src_p, font->texture->row_bytes,
- dst_p, gr_draw->row_bytes,
- font->char_width, font->char_height);
+ unsigned char ch;
+ while ((ch = *s++)) {
+ if (outside(x, y) || outside(x + font->char_width - 1, y + font->char_height - 1)) break;
- x += font->char_width;
+ if (ch < ' ' || ch > '~') {
+ ch = '?';
}
+
+ int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
+ uint8_t* src_p = font->texture->data + ((ch - ' ') * font->char_width) +
+ (bold ? font->char_height * font->texture->row_bytes : 0);
+ uint32_t* dst_p = pixel_at(gr_draw, x, y, row_pixels);
+
+ text_blend(src_p, font->texture->row_bytes, dst_p, row_pixels, font->char_width,
+ font->char_height);
+
+ x += font->char_width;
+ }
}
void gr_texticon(int x, int y, GRSurface* icon) {
- if (icon == NULL) return;
+ if (icon == NULL) return;
- if (icon->pixel_bytes != 1) {
- printf("gr_texticon: source has wrong format\n");
- return;
- }
+ if (icon->pixel_bytes != 1) {
+ printf("gr_texticon: source has wrong format\n");
+ return;
+ }
- x += overscan_offset_x;
- y += overscan_offset_y;
+ x += overscan_offset_x;
+ y += overscan_offset_y;
- if (outside(x, y) || outside(x+icon->width-1, y+icon->height-1)) return;
+ if (outside(x, y) || outside(x + icon->width - 1, y + icon->height - 1)) return;
- unsigned char* src_p = icon->data;
- unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes;
+ int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
+ uint8_t* src_p = icon->data;
+ uint32_t* dst_p = pixel_at(gr_draw, x, y, row_pixels);
- text_blend(src_p, icon->row_bytes,
- dst_p, gr_draw->row_bytes,
- icon->width, icon->height);
+ text_blend(src_p, icon->row_bytes, dst_p, row_pixels, icon->width, icon->height);
}
-void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
-{
+void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
+ uint32_t r32 = r, g32 = g, b32 = b, a32 = a;
#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
- gr_current_r = b;
- gr_current_g = g;
- gr_current_b = r;
- gr_current_a = a;
+ gr_current = (a32 << 24) | (r32 << 16) | (g32 << 8) | b32;
#else
- gr_current_r = r;
- gr_current_g = g;
- gr_current_b = b;
- gr_current_a = a;
+ gr_current = (a32 << 24) | (b32 << 16) | (g32 << 8) | r32;
#endif
}
-void gr_clear()
-{
- if (gr_current_r == gr_current_g && gr_current_r == gr_current_b) {
- memset(gr_draw->data, gr_current_r, gr_draw->height * gr_draw->row_bytes);
- } else {
- unsigned char* px = gr_draw->data;
- for (int y = 0; y < gr_draw->height; ++y) {
- for (int x = 0; x < gr_draw->width; ++x) {
- *px++ = gr_current_r;
- *px++ = gr_current_g;
- *px++ = gr_current_b;
- px++;
- }
- px += gr_draw->row_bytes - (gr_draw->width * gr_draw->pixel_bytes);
- }
+void gr_clear() {
+ if ((gr_current & 0xff) == ((gr_current >> 8) & 0xff) &&
+ (gr_current & 0xff) == ((gr_current >> 16) & 0xff) &&
+ (gr_current & 0xff) == ((gr_current >> 24) & 0xff) &&
+ gr_draw->row_bytes == gr_draw->width * gr_draw->pixel_bytes) {
+ memset(gr_draw->data, gr_current & 0xff, gr_draw->height * gr_draw->row_bytes);
+ } else {
+ uint32_t* px = reinterpret_cast<uint32_t*>(gr_draw->data);
+ int row_diff = gr_draw->row_bytes / gr_draw->pixel_bytes - gr_draw->width;
+ for (int y = 0; y < gr_draw->height; ++y) {
+ for (int x = 0; x < gr_draw->width; ++x) {
+ *px++ = gr_current;
+ }
+ px += row_diff;
}
+ }
}
-void gr_fill(int x1, int y1, int x2, int y2)
-{
- x1 += overscan_offset_x;
- y1 += overscan_offset_y;
-
- x2 += overscan_offset_x;
- y2 += overscan_offset_y;
-
- if (outside(x1, y1) || outside(x2-1, y2-1)) return;
-
- unsigned char* p = gr_draw->data + y1 * gr_draw->row_bytes + x1 * gr_draw->pixel_bytes;
- if (gr_current_a == 255) {
- int x, y;
- for (y = y1; y < y2; ++y) {
- unsigned char* px = p;
- for (x = x1; x < x2; ++x) {
- *px++ = gr_current_r;
- *px++ = gr_current_g;
- *px++ = gr_current_b;
- px++;
- }
- p += gr_draw->row_bytes;
- }
- } else if (gr_current_a > 0) {
- int x, y;
- for (y = y1; y < y2; ++y) {
- unsigned char* px = p;
- for (x = x1; x < x2; ++x) {
- *px = (*px * (255-gr_current_a) + gr_current_r * gr_current_a) / 255;
- ++px;
- *px = (*px * (255-gr_current_a) + gr_current_g * gr_current_a) / 255;
- ++px;
- *px = (*px * (255-gr_current_a) + gr_current_b * gr_current_a) / 255;
- ++px;
- ++px;
- }
- p += gr_draw->row_bytes;
- }
+void gr_fill(int x1, int y1, int x2, int y2) {
+ x1 += overscan_offset_x;
+ y1 += overscan_offset_y;
+
+ x2 += overscan_offset_x;
+ y2 += overscan_offset_y;
+
+ if (outside(x1, y1) || outside(x2 - 1, y2 - 1)) return;
+
+ int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
+ uint32_t* p = pixel_at(gr_draw, x1, y1, row_pixels);
+ uint8_t alpha = static_cast<uint8_t>(((gr_current & alpha_mask) >> 24));
+ if (alpha > 0) {
+ for (int y = y1; y < y2; ++y) {
+ uint32_t* px = p;
+ for (int x = x1; x < x2; ++x) {
+ *px = pixel_blend(alpha, *px);
+ incr_x(&px, row_pixels);
+ }
+ incr_y(&p, row_pixels);
}
+ }
}
void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) {
- if (source == NULL) return;
-
- if (gr_draw->pixel_bytes != source->pixel_bytes) {
- printf("gr_blit: source has wrong format\n");
- return;
- }
-
- dx += overscan_offset_x;
- dy += overscan_offset_y;
+ if (source == NULL) return;
- if (outside(dx, dy) || outside(dx+w-1, dy+h-1)) return;
+ if (gr_draw->pixel_bytes != source->pixel_bytes) {
+ printf("gr_blit: source has wrong format\n");
+ return;
+ }
- unsigned char* src_p = source->data + sy*source->row_bytes + sx*source->pixel_bytes;
- unsigned char* dst_p = gr_draw->data + dy*gr_draw->row_bytes + dx*gr_draw->pixel_bytes;
+ dx += overscan_offset_x;
+ dy += overscan_offset_y;
+
+ if (outside(dx, dy) || outside(dx + w - 1, dy + h - 1)) return;
+
+ if (rotation) {
+ int src_row_pixels = source->row_bytes / source->pixel_bytes;
+ int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
+ uint32_t* src_py = reinterpret_cast<uint32_t*>(source->data) + sy * source->row_bytes / 4 + sx;
+ uint32_t* dst_py = pixel_at(gr_draw, dx, dy, row_pixels);
+
+ for (int y = 0; y < h; y += 1) {
+ uint32_t* src_px = src_py;
+ uint32_t* dst_px = dst_py;
+ for (int x = 0; x < w; x += 1) {
+ *dst_px = *src_px++;
+ incr_x(&dst_px, row_pixels);
+ }
+ src_py += src_row_pixels;
+ incr_y(&dst_py, row_pixels);
+ }
+ } else {
+ unsigned char* src_p = source->data + sy * source->row_bytes + sx * source->pixel_bytes;
+ unsigned char* dst_p = gr_draw->data + dy * gr_draw->row_bytes + dx * gr_draw->pixel_bytes;
int i;
for (i = 0; i < h; ++i) {
- memcpy(dst_p, src_p, w * source->pixel_bytes);
- src_p += source->row_bytes;
- dst_p += gr_draw->row_bytes;
+ memcpy(dst_p, src_p, w * source->pixel_bytes);
+ src_p += source->row_bytes;
+ dst_p += gr_draw->row_bytes;
}
+ }
}
unsigned int gr_get_width(GRSurface* surface) {
- if (surface == NULL) {
- return 0;
- }
- return surface->width;
+ if (surface == NULL) {
+ return 0;
+ }
+ return surface->width;
}
unsigned int gr_get_height(GRSurface* surface) {
- if (surface == NULL) {
- return 0;
- }
- return surface->height;
+ if (surface == NULL) {
+ return 0;
+ }
+ return surface->height;
}
int gr_init_font(const char* name, GRFont** dest) {
- GRFont* font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font)));
- if (font == nullptr) {
- return -1;
- }
+ GRFont* font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font)));
+ if (font == nullptr) {
+ return -1;
+ }
- int res = res_create_alpha_surface(name, &(font->texture));
- if (res < 0) {
- free(font);
- return res;
- }
+ int res = res_create_alpha_surface(name, &(font->texture));
+ if (res < 0) {
+ free(font);
+ return res;
+ }
- // The font image should be a 96x2 array of character images. The
- // columns are the printable ASCII characters 0x20 - 0x7f. The
- // top row is regular text; the bottom row is bold.
- font->char_width = font->texture->width / 96;
- font->char_height = font->texture->height / 2;
+ // The font image should be a 96x2 array of character images. The
+ // columns are the printable ASCII characters 0x20 - 0x7f. The
+ // top row is regular text; the bottom row is bold.
+ font->char_width = font->texture->width / 96;
+ font->char_height = font->texture->height / 2;
- *dest = font;
+ *dest = font;
- return 0;
+ return 0;
}
-static void gr_init_font(void)
-{
- int res = gr_init_font("font", &gr_font);
- if (res == 0) {
- return;
- }
-
- printf("failed to read font: res=%d\n", res);
+static void gr_init_font(void) {
+ int res = gr_init_font("font", &gr_font);
+ if (res == 0) {
+ return;
+ }
+ printf("failed to read font: res=%d\n", res);
- // fall back to the compiled-in font.
- gr_font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font)));
- gr_font->texture = static_cast<GRSurface*>(malloc(sizeof(*gr_font->texture)));
- gr_font->texture->width = font.width;
- gr_font->texture->height = font.height;
- gr_font->texture->row_bytes = font.width;
- gr_font->texture->pixel_bytes = 1;
+ // fall back to the compiled-in font.
+ gr_font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font)));
+ gr_font->texture = static_cast<GRSurface*>(malloc(sizeof(*gr_font->texture)));
+ gr_font->texture->width = font.width;
+ gr_font->texture->height = font.height;
+ gr_font->texture->row_bytes = font.width;
+ gr_font->texture->pixel_bytes = 1;
- unsigned char* bits = static_cast<unsigned char*>(malloc(font.width * font.height));
- gr_font->texture->data = bits;
+ unsigned char* bits = static_cast<unsigned char*>(malloc(font.width * font.height));
+ gr_font->texture->data = bits;
- unsigned char data;
- unsigned char* in = font.rundata;
- while((data = *in++)) {
- memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f);
- bits += (data & 0x7f);
- }
+ unsigned char data;
+ unsigned char* in = font.rundata;
+ while ((data = *in++)) {
+ memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f);
+ bits += (data & 0x7f);
+ }
- gr_font->char_width = font.char_width;
- gr_font->char_height = font.char_height;
+ gr_font->char_width = font.char_width;
+ gr_font->char_height = font.char_height;
}
void gr_flip() {
@@ -344,6 +375,12 @@ int gr_init() {
gr_flip();
gr_flip();
+ gr_rotate(DEFAULT_ROTATION);
+
+ if (gr_draw->pixel_bytes != 4) {
+ printf("gr_init: Only 4-byte pixel formats supported\n");
+ }
+
return 0;
}
@@ -352,13 +389,19 @@ void gr_exit() {
}
int gr_fb_width() {
- return gr_draw->width - 2 * overscan_offset_x;
+ return rotation % 2 ? gr_draw->height - 2 * overscan_offset_y
+ : gr_draw->width - 2 * overscan_offset_x;
}
int gr_fb_height() {
- return gr_draw->height - 2 * overscan_offset_y;
+ return rotation % 2 ? gr_draw->width - 2 * overscan_offset_x
+ : gr_draw->height - 2 * overscan_offset_y;
}
void gr_fb_blank(bool blank) {
gr_backend->Blank(blank);
}
+
+void gr_rotate(GRRotation rot) {
+ rotation = rot;
+}
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