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Merge "minui: Clean up the use of rotation."

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am: a9ef617aa7

Change-Id: Id87dce642ff0c8352c4dea2266cbd08558b20145
This commit is contained in:
Tao Bao 2018-08-01 14:30:11 -07:00 committed by android-build-merger
commit f22aeefaed
2 changed files with 50 additions and 27 deletions
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67
minui/graphics.cpp
View file

@ -40,11 +40,12 @@ static constexpr uint32_t alpha_mask = 0xff000000;
// gr_draw is owned by backends.
static const GRSurface* gr_draw = nullptr;
static GRRotation rotation = ROTATION_NONE;
static GRRotation rotation = GRRotation::NONE;
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);
auto swapped = (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT);
return x < 0 || x >= (swapped ? gr_draw->height : gr_draw->width) || y < 0 ||
y >= (swapped ? gr_draw->width : gr_draw->height);
}
const GRFont* gr_sys_font() {
@ -89,36 +90,44 @@ static inline uint32_t pixel_blend(uint8_t alpha, uint32_t pix) {
// 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);
if (rotation == GRRotation::LEFT) {
*p = *p - row_pixels;
} else if (rotation == GRRotation::RIGHT) {
*p = *p + row_pixels;
} else if (rotation == GRRotation::DOWN) {
*p = *p - 1;
} else { // GRRotation::NONE
*p = *p + 1;
}
}
// 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;
if (rotation == GRRotation::LEFT) {
*p = *p + 1;
} else if (rotation == GRRotation::RIGHT) {
*p = *p - 1;
} else if (rotation == GRRotation::DOWN) {
*p = *p - row_pixels;
} else { // GRRotation::NONE
*p = *p + row_pixels;
}
}
// Returns pixel pointer at given coordinates with rotation adjustment.
static uint32_t* pixel_at(const GRSurface* surf, int x, int y, int row_pixels) {
switch (rotation) {
case ROTATION_NONE:
case GRRotation::NONE:
return reinterpret_cast<uint32_t*>(surf->data) + y * row_pixels + x;
case ROTATION_RIGHT:
case GRRotation::RIGHT:
return reinterpret_cast<uint32_t*>(surf->data) + x * row_pixels + (surf->width - y);
case ROTATION_DOWN:
case GRRotation::DOWN:
return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - y) * row_pixels +
(surf->width - 1 - x);
case ROTATION_LEFT:
case GRRotation::LEFT:
return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - x) * row_pixels + y;
default:
printf("invalid rotation %d", rotation);
printf("invalid rotation %d", static_cast<int>(rotation));
}
return nullptr;
}
@ -256,7 +265,7 @@ void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) {
if (outside(dx, dy) || outside(dx + w - 1, dy + h - 1)) return;
if (rotation) {
if (rotation != GRRotation::NONE) {
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;
@ -361,7 +370,19 @@ int gr_init() {
return -1;
}
gr_rotate(DEFAULT_ROTATION);
#define __STRINGIFY(x) #x
#define STRINGIFY(x) __STRINGIFY(x)
std::string rotation_str(STRINGIFY(DEFAULT_ROTATION));
if (rotation_str == "ROTATION_RIGHT") {
gr_rotate(GRRotation::RIGHT);
} else if (rotation_str == "ROTATION_DOWN") {
gr_rotate(GRRotation::DOWN);
} else if (rotation_str == "ROTATION_LEFT") {
gr_rotate(GRRotation::LEFT);
} else { // "ROTATION_NONE"
gr_rotate(GRRotation::NONE);
}
if (gr_draw->pixel_bytes != 4) {
printf("gr_init: Only 4-byte pixel formats supported\n");
@ -379,13 +400,15 @@ void gr_exit() {
}
int gr_fb_width() {
return rotation % 2 ? gr_draw->height - 2 * overscan_offset_y
: gr_draw->width - 2 * overscan_offset_x;
return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
? gr_draw->height - 2 * overscan_offset_y
: gr_draw->width - 2 * overscan_offset_x;
}
int gr_fb_height() {
return rotation % 2 ? gr_draw->width - 2 * overscan_offset_x
: gr_draw->height - 2 * overscan_offset_y;
return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
? gr_draw->width - 2 * overscan_offset_x
: gr_draw->height - 2 * overscan_offset_y;
}
void gr_fb_blank(bool blank) {

10
minui/include/minui/minui.h
View file

@ -41,11 +41,11 @@ struct GRFont {
int char_height;
};
enum GRRotation {
ROTATION_NONE = 0,
ROTATION_RIGHT = 1,
ROTATION_DOWN = 2,
ROTATION_LEFT = 3,
enum class GRRotation : int {
NONE = 0,
RIGHT = 1,
DOWN = 2,
LEFT = 3,
};
// Initializes the graphics backend and loads font file. Returns 0 on success, or -1 on error. Note