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Start implementing DISPCNT

This commit is contained in:
Jeffrey Pfau 2013-04-21 12:48:14 -07:00
parent cdddcbf7aa
commit 933e8330d2
3 changed files with 24 additions and 1 deletions
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1
src/gba/gba-io.c
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@ -3,6 +3,7 @@
#include "gba-video.h"
void GBAIOInit(struct GBA* gba) {
gba->memory.io[REG_DISPCNT >> 1] = 0x0080;
gba->memory.io[REG_KEYINPUT >> 1] = 0x3FF;
}

20
src/gba/renderers/video-software.c
View File

@ -1,6 +1,7 @@
#include "video-software.h"
#include "gba.h"
#include "gba-io.h"
static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
@ -8,6 +9,8 @@ static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRender
static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
renderer->d.init = GBAVideoSoftwareRendererInit;
renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
@ -26,6 +29,8 @@ void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
softwareRenderer->dispcnt.packed = 0x0080;
pthread_mutex_init(&softwareRenderer->mutex, 0);
pthread_cond_init(&softwareRenderer->cond, 0);
}
@ -37,6 +42,11 @@ static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
switch (address) {
case REG_DISPCNT:
value &= 0xFFFB;
softwareRenderer->dispcnt.packed = value;
GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
break;
default:
GBALog(GBA_LOG_STUB, "Stub video register write: %03x", address);
}
@ -47,6 +57,12 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
int x;
uint16_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
if (softwareRenderer->dispcnt.forcedBlank) {
for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
row[x] = 0x7FFF;
}
return;
}
for (x = 0; x < 16; ++x) {
row[(x * 15) + 0] = renderer->palette[x + (y / 5) * 16];
row[(x * 15) + 1] = renderer->palette[x + (y / 5) * 16];
@ -73,3 +89,7 @@ static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* rendere
pthread_cond_wait(&softwareRenderer->cond, &softwareRenderer->mutex);
pthread_mutex_unlock(&softwareRenderer->mutex);
}
static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
// TODO
}

2
src/gba/renderers/video-software.h
View File

@ -11,6 +11,8 @@ struct GBAVideoSoftwareRenderer {
uint16_t* outputBuffer;
unsigned outputBufferStride;
union GBARegisterDISPCNT dispcnt;
pthread_mutex_t mutex;
pthread_cond_t cond;
};